Please note that Sincerity is still under development and that this documentation is incomplete.
Sincerity can work with a any arbitrary repository for which it has the supported technology. That said, here's an overview of some repositories that you are most likely to work with:
The Three Crickets Repository
Python and PyPI (a.k.a. "The Cheese Factory")
Ruby and Gems
PHP and PEAR
The Sincerity Manual is provided for you under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The complete manual is available for download as a PDF.