If this is useful, I always appreciate a thanks (button on the bottom of post)
And don't forget to post your favorite apps, it can be more than 3 if you have them, with quick description
S-OFF Root your phone
S-OFF - Thread on how to S-Off or Root your phone
Dolphin Browser - Powerful, Fast & Elegant web browser for Android 2.0+.Browsing made wonderful.
Firefox - If you just have to have a different browser from Opera
Maxthon - Fast Browser
Opera Mobile Web Browser - Great Web Browser.
Skyfire – browser that does flash
ChompSMS - Has lots of extra SMS features like chat-style bubbles, contact pictures, quick reply, signatures, templates, blacklisting, heaps of customizations, themes, FREE texting using the **TextFreek Service** and much much more!
Craigslist Notification - Get notifications when stuff is posted to craigslist.
CSipSimple - High quality OpenSource SIP OpenSource (GPL) project for SIP on Android.
Dialer One - Smart multilingual T9 like dialer application. *Speed dial *Call log grouped by contact *Send contact *Customizable *Swipe between screens
Facebook for Android - Facebook on your phone, I like it better than the widgets, but that is just me.
Fring - Group video calls and chat.
Go SMS Pro - GO SMS PRO brings you cool UI, fast and convenient SMS/MMS experience. GO SMS Pro(yet FREE) is a huge enhancement for stock messaging app, much faster, more functions.
Handcent SMS - A powerful free sms/mms tools for your android phone. Handcent fully unleashes the messaging power for android phones, fully customizable and more features than the stock android messaging app.
KakaoTalk - Enjoy free group or one-to-one chats anywhere in the world. (both iPhone and Android)
Rocket Dialer - The most powerful and comprehensive dialer in android. Makes 3 way calling and picking up call waiting easier.
Skype – Skype for your phone
SMS Popup - Quickly read and reply to SMS messages from a convenient popup window. SMS Popup provides a convenient popup dialog when a message is received that allows you to quickly read and reply to messages. It also provides in-depth customization of message notifications including contact specific sound, vibrate and LED settings.
Taptu – Clever social news feed reader. Get the latest on your interests in one place.
Viber - Viber is an Android and iPhone application that lets you make free phone calls and send free text messages to other users that have Viber installed.
Voice Dialer - although you can dial on your phone with voice search, if you want an explicit voice dialer it is here in this thread.
Qik – Video chat
WordPress - Write new posts, edit content, and manage comments on your WordPress blog.
Media / Entertainment
Audiogalaxy - Superb music streaming app. Install the server software on your PC or NAS and have all of YOUR music all the time. AG > Google Music for me, don't want to know what Google would charge me to host my 320g in the 'cloud'.
Camera360 - add effects to photos.
DI.Radio - Digitally Imported streams the world’s most addictive electronic music. If you like digital music, this is the app for you.
Dice Player - Hardware Accelerated Media Player
Double Twist - Itunes for Android.
Gmote 2.0 - Control your computer's media player from your phone.
Google Books – read over 3 million books on your phone. Some of them free.
Google Listen - Podcasts. Great settings to download new ones only while on WiFi and charging.
Hi-Q - Record audio in high quality directly into MP3 files! Voice dictation, songs, sermons, music, and concerts can be recorded in 44 kHz, much better than the default sound recorder application. You can manage and send recordings by email and Bluetooth (depends on phone model) or by copying files directly from the SD Card.
MixZing - MixZing is simply the most advanced media player around! A lot of cool features, way more advanced than stock music player.
Netflix - Reported to work with HTC Sensation. Another Link Here
Pandora – Internet radio station. Listen to your favorite music.
Photoshop Express - Edit and share photos virtually anywhere. Touch to crop, rotate, adjust color, and add artistic effects.
Picasa Tool - Picasa Tool Pro helps you to manage your Picasa web albums with simple yet powerful user interface designed specifically for Android powered smartphone.
Plex for Android - Plex for Android allows you to browse and play your video, photos, and music right on your Android device, streamed from Plex Media Server on your Mac or your PC
Pulse News - Pulse is a beautiful app that takes your favorite websites and transforms them into a colorful and interactive mosaic. Tap on an article to see a clean and elegant view of the news story.
QuickPic - Smaller! Faster! Clearer! The best picture viewer/browser/gallery!
RingDroid – Make and edit ringtones
Ringtone Maker – Make and edit ringtones
Robotic Guitarist – play the guitar on your phone
Scanner Radio - Listen to police and fire departments from around the world on your phone.
Shazam - Can identify songs by hearing them. Hold your phone up to the song to identify the track, buy it, check out the videos, get the lyrics, share it with friends – and more!
Slacker – Free Internet radio stations. Listen to your favorite style of music
StreamFurious - Simple streaming audio for your Android, browser link support. Free with no ads. Plays shoutcast/icecast mp3 streams.
TuneIn Radio - Browse and listen to radio -- live, local and global. Listen live to your favorite radio stations, DJs and programs and find new ones on local, global and Internet radio.
TuneWiki - The Music Player with Lyrics and a Social Network for Music Discovery
Unified Remote - Easily the most feature-filled Android-PC remote. Turns your Android device into a WiFi or Bluetooth remote control for your Windows PC. Control your favorite programs, mouse, and keyboard.
Voice Recorder - Voice recording app for your phone.
XDA Premium - This is the official XDA-Developers Premium Android App! By popular request, we present to you the Premium version of the official XDA-Developers Android app! This app lets you access the world-famous XDA forums, plus reply to threads, add new ones, manage your PMs, and more!
Zedge - Personalize your Android phone with the #1 wallpaper & ringtone app. Millions of free, unique and rare ringtones, notification sounds & wallpapers.
Office / Productivity
Andie Graph – A TI calculator emulator. You need the TI rom’s to use it.
CamScanner – turn your phone camera into a scanner. Generates .pdf’s.
Catch Notes - Catch Notes is a feature-packed app that allows you to capture your ideas and experiences in text, voice, images, and locations, all with free sync & backups to Catch.com. Passcode-protect your personal activity stream, set reminders, share content, and keep organized with easy #tags and a homescreen widget!
Documents to Go 3.0 - View Microsoft Word, Excel & PowerPoint Files - All in 1 App FREE! View native Microsoft Word, Excel and PowerPoint files & attachments with Documents To Go Main App. Supported file formats include .doc,. docx,. xls,. xlsx,. ppt,. pptx. (to edit files you have to get paid version)
Epistle - A simple and clean text editor that can sync all your notes with Dropbox. It also supports the Markdown language, with a live preview of your notes.
Evernote - Evernote is an easy-to-use, free app that helps you remember everything across all of the devices you use. Stay organized, save your ideas and improve productivity. Evernote lets you take notes, capture photos, create to-do lists, record voice reminders--and makes these notes completely searchable, whether you are at home, at work, or on the go.
Freenote - FreeNote is the most convenient note app for android. Feature list: Unique hybrid model for combined handwriting and keyboard; Text,paint,voice,photo,video...Note everything; Calender,alarm,todo...Getting things done.
Google Docs - You need to be online to do it, but you can edit office docs with Google Docs, and it is free.
Grapher - Plot functions and trace their graphs with ease! This is a simple graphing calculator with graphing capabilities similar to TI-83 or TI-89 calculators.
Jorte - an app with the look and feel of real paper personal organizer with an appealing appearance and easy practical use. Jorte has a scheduler function and you can customize its style as you choose.
PocketCloud - Access your computer and virtual desktops from your mobile device. PocketCloud enables remote access to Windows or Mac desktops over WiFi and 3G/4G networks
Polaris Office – Open, read, and edit Microsoft word, excel and powerpoint (No Android Market link anymore. Not sure why)
Quick Office – Open, read and edit Microsoft Word, Excel and PowerPoint and .Pdf’s
RealCalc – Scientific Calculator. More powerful than the standard one.
SimpleNote Notepad - SimpleNote Notepad is just a simple notepad app supporting editing, viewing notes, searching, exporting, importing, backing up, and restoring notes. No ads.
Springpad - Makes it easy to save notes, products and places you want to remember
Team Viewer - Remotely control your computer from your phone.
Thinking Space - A Mind-Mapping application. Create visual thought maps that help organize and plan your activities and ideas.
WakeVoice - Much more than a simple alarm clock, WakeVoice lets you interact with your phone using your voice: - Talk to it with custom commands to stop the alarm or activate the snooze option - Listen to your phone telling you about the weather, news of your choice or a personalized message while staying warm in your bed
Advanced Task Manager - Best task killer for android system, speed up phone, free up Ram, save battery.
Alarm Clock Plus - Ensure you always wake up with Alarm Clock Plus! ALARM CLOCK PLUS IS HANDS DOWN THE MOST FULL FEATURED ALARM CLOCK APP ON ANDROID!
Anycut - Any Cut allows you to create Home shortcuts to anything! Popular shortcuts like directly calling a phone number or sending an SMS are supported.
AppSaver - Easy install apps from your SDcard, Quick save apps to SDCard, Quick uninstall apps you dislike.
Assited GPS Injector - Improve GPS fix time for ANY GPS-enabled application. Automatically request Assisted GPS data download (Internet connection required) before starting any application to ensure shortest time to acquire proper GPS fix.
AudioManager/AudioManager Pro - Customizable audio control app. Set different levels for everything - ringtones, media, alerts, etc... then save profiles. Makes switching them up super simple with shortcuts on the home screen.
Battery Monitor Widget - monitors Battery Use in every possible way you can imagine and more.
Blade Buddy - Blade Buddy Free (Ad-supported version) allows you go edit various system settings on your Android Device. Some functions don’t work if you haven’t rooted your phone.
Brightness Level - This is widget/app, which allows you easily change screen brightness.
Call Confirm - Stop making accidental calls. App confirms you want to make a call before placing it.
Car Home - The stock android car home - A car mode for your phone, makes it easier to use as you drive. Make sure you also download Car Mode Control. More details HTC Car Panel HERE (thanks GorillaPimp) Download HERE also
Car Mode Control - On HTC Sensation, you need this to launch Car Home.
Chainfire 3D - Chainfire3D is an intermediary OpenGL driver. What does that mean? It means that Chainfire3D sits between your apps and the graphics drivers, and can intercept and/or change commands between the two.
Custom Android Font Switcher - Custom Android Font Switcher is an easy to use font-switching app. It provides you switch over 150 custom fonts that, with the click of a button, you can apply to your phone.
EasyProfiles - EasyProfiles is an intuitive, flexible, battery saving tool which allows you to automatically or manually switch between profiles that you have defined. A profile is a collection of system settings you select to make your device behave as you would like for each situation (quiet, loud, GPS on, etc).
Easy Reminder - Remind You missed call and unread sms/mms, easy to use and highly configurable! You can easily set an alert that will be repeated periodically. You can also decide a time slot during which You will not be disturbed.
Elixer - Do you want to know everything about your device? Try Elixir and its widgets! Elixir is a system information application with highly configurable widgets. Displays information about battery, cpu usage, memory usage, internal and external storage (sd-card), display, wifi, mobile network, location services (gps), bluetooth, sync, airplane mode, sensors, etc.
Extended Controls – Great way to have a widget that controls and toggles many settings (wifi on/off, vibrate/sound/silent, gps on/off, etc.) Too many options to list, great tool!
Go Launcher EX - GO Launcher EX is the extended version of GO Launcher, one of the most popular home apps in Android Market. It’s a highly customizable home replacement application, which will run when you press your android phone’s HOME key.
Gravity Home - Gravity Home = Live wallpaper + Launcher + Physics. Transform your home screen in a funny alternative launcher. Turn the phone upside down and watch your favorite app icons respond to gravity, hanging aroung the screen, being completelly funcional. Thread on it HERE.
Intelligent Key Unlocker - The intelligent enhancement for your lockscreen! If enabled, the Intelligent Keylock Unlocker unlocks your lock screen automatically if the proximity sensor does not register any object closer than a few centimeters to it.
Irssi ConnectBot - Irssi ConnectBot is modified version of the popular ConnectBot SSH client. Has features which helps users to use Irssi.
Juice Defender Beta - Battery Saving Utility. Some find it useful.
Lightening Bug - Alarm Clock and Sleep noise generator. A simple but powerful ambience and white noise mixer for Android powered devices.
Linda Application Manager - If you want File/Application/Task Manager in one APK, download Linda File Manager -quick install/uninstall -Sort By and Group By Name/Date/Type/Size -Collapse All/Expand All -Backup/Backup All -Search at Market -Category your backup -Launch Application
Linda File Manager - The Best File Manager, do anything(File/App/Task/Zip etc.) , just 500k
Llama - Location Aware Profile Utility. You can change sounds, power settings, etc. based on where you are.
Lookout - Lookout offers top rated Android security to stop malware, spyware, data loss and device loss.
Network Info II - All the network information you'll need. WiFi/Bluetooth/Cell/IPv6
Overlook Fing - the ultimate tool for network management: network discovery, service scan (TCP port scan), ping, traceroute, DNS lookup.
PhoneLocator Pro - Complete control over your lost or stolen droid! Find your lost or stolen phone, auto enable GPS(rooted phones), make it ring, remotely lock, remotely wipe, hide the app, know with whom the thief is speaking!
Quick System Info Pro - Explore your system state better. Quick access of the basic system information for your Android platform, including information for CPU, memory, SD Card, running processes, network states and installed applications.
Smartbar - Manage Apps/Tasks. Batch Install/Uninstall/Backup apps. Customize things.
Spare Parts - allows you to enable some settings that are not found in the default setting menu
Speech Synthesis Data Installer - Installs the data files needed by the Android TTS for synthesizing in the following languages: English (US), English (UK), French, German, Italian, Spanish. (Need it for voice in Navigation)
Speed Test - speedtest.net for your phone. See how fast your data connection is.
Swiftkey X Beta – A nice replacement AI keyboard for you sensation. Not compatible with some hardware keyboards (works on HTC Sensation)
SwiFTP - An open-source FTP server that allows you to connect to your phone over wifi or cellular/3g to upload and download files. Any FTP client can be used.
Swipe Beta - Swipe keyboard beta.
Tap Tap App - Lock and unlock the screen with a double tap the proximity sensor. Also a widget that locks your phone with one click.
Tricorder – Mostly just fun. See what your sensors register on your phone. Supposed to be a star trek tricorder.
Visidon Applock - Fast, convenient and cool way to protect your mobile with face recognition. Protect any application (i.e. SMS, Gallery, E-Mail, Facebook, etc.) on your phone using face recognition. Convenient and cool way to increase safety of your private apps and content.
Volume+ - Volume Booster, FEATURES INCLUDE: On/Off toggle, Volume Boost, EQ pre-sets, Bass Enhancer, Stereo Widener (only for Headset/Bluetooth Headset), Virtual Room Effect (VRE - Echo). ALL FEATURES AVAILABLE FOR: Phone Speaker, Headset, Bluetooth Headset
Wave Launcher - A quick gesture-enabled quick launch bar always accessible with a simple gesture. With a single swipe you can launch up to 120(!) of your favorite apps, shortcuts and recently-used apps regardless of which app is currently running. Wave Launcher is accessible anytime, anywhere!
Wallpaper Wizardrii - WW will take any size image and set it as your wallpaper; which means you are no longer forced to Crop a large image to set it as wallpaper.
Widgetlocker - Powerful lockscreen customizing app. A lock screen replacement that puts you in control of the look, feel and layout of your lock screen.
Wifi Analyzer – see what wifi’s are around you, the strength of their signal, and what channel they are on, all in a great graphics interface. I love it!
WiFi Explorer - Browse, download, upload, delete, copy, ZIP, stream and manage files via WiFi!!
Wifi Manager – Control your wifi access, and switch between networks easily