I will take the lead on releases of this tool as Bin4ry will have less time to work on it.
For all flashtool informations (download links, changelog, screenshot gallery, FAQ, Firmwares repository) go to the Flashtool Homepage
Flashtool sources are on github : Androxyde repositories
WARNING : Since Xperia Z, sony added a new set of files I called bootbundle. Those files can be bundled from 0.9.13 and can be flashed from 0.9.13 only. To all those flashing devices from Z edition to all after Z, it is highly advised to use 0.9.13 and to be sure FTF you flash contain the bootbundle set. I've been reported of hard bricks because of missing such set of files from bundles.
To Xperia Z3+/Z4/Tablet Z4 users : Flashtool is not yet compatible with those devices. Even if flashing went without issues, it seems it break some important features such as the ability to unlock the bootloader.
Please Xperia Z3+/Z4/Tablet Z4 users : DO NOT USE FLASHTOOL YET. I am working on it for the next release.