LatinIME (Android AOSP keyboard)
It's similar to the current one and the Google Keyboard with the following differences:
Symbols menu is different (I don't see how, it just looks different)
Emoji section (Replaces enter in some apps, long press the bottom right key otherwise)
For emoji, I presume you need the font. If you don't have the font, I'm going to shamelessly plug my app
(The background is the emoji keyboard from my app, I just happened to test it on that [Ironic, eh?])
Install as normal APK, push to /system/app/ if you need to
Note: Gesture typing doesn't appear to be working, make your backups!