Lens-shading support, writeable analog gain, and other additional features have been merged into the picamerax library at https://github.com/labthings/picamerax.
- The code is licensed under the BSD license
- The source code can be obtained from GitHub, which also hosts the bug tracker
- The documentation (which includes installation, quick-start examples, and lots of code recipes) can be read on ReadTheDocs
- Packages can be downloaded from PyPI, but reading the installation instructions is more likely to be useful