Any repositories with the user "tao_official" are administratively-controlled repositories, and are usually high-quality and useful scripts and functions, all in the public domain.
In particular, there are official 'core' libraries, for various languages (mxs_lib and there will be Maya and Python ones as well). They should be viewed as a required library for scripts in any tao_official repositories.
The official scripts are all tested and continue to undergo optimization. They cover any number of general topics- see here for complete documentation.
There should be a doc.html file located in each library repository that lists the documented functions and features of all files.
TAO encourages script writers to use generalized functions, both existing and new, when scripting. This way, there is minimal duplication, and those new functions can eventually be incorporated into the Functions Library. For more information about best practices, see [w]TAO:Code Conventions[/w].
If you would like anything added to the library- either your own functions or those of others, or have any questions or comments, please post here or contact me.