I finally found time and energy to put up a repository on github (which has been suggested to me and also largely used by other TES devs)
Update (30/01/13) :
Merge with rubenmp8's new version of nifconverter
By now (17/01/13) it includes:
1) Fairly Reworked niflib, fixed some annoying bugs which includes the infamous BSNumUvSets setting
2) Heavily reworked niftexture with Happychappy's additions and texture list
I tried to keep it as clean as possible and use relative paths when needed, please feel free to use this repository and this thread for pushes/features requests and tools updates.
Besides, i'm fairly new to git and github, so feel free to contact me and point any mistakes.