This is the Git repository for Gaffer, the Blender Add-on for speeding up your lighting workflow.
You can download it here to try it out. If you like it, please consider purchasing it from the Blender Market. $20 isn't much, and every sale puts a smile on my face and motivates me to keep developing it :)
A portion of every sale is donated to the Blender Development Fund too.
Documentation can be found in the wiki, and a list of changes in the commit logs or on the Releases page.