The CycleColorSchemes package lets you cycle through your favorite color schemes with a key combination (or the command palette, if you prefer). I use it for toggling between light and dark color scheme versions, but there’s no limit to how many schemes you can have in the cycle.
The files and specific usage instructions are at github.com/SyntaxColoring/CycleColorSchemes.
This is my first Sublime Text plugin and the first thing I’ve written in Python, so I would love suggestions and bug reports.