BlurFocus
BlurFocus is a SIMBL plugin for macOS which blurs windows when out of focus. I forked the project from w0lfschild's repo, reworking the codebase from the ground up to support animated transitions and fix rendering bugs in the original version.
CleanMenuBar
CleanMenuBar is a SIMBL plugin for macOS which enables you to clean up your cluttered menu bar by specifying third-party apps to hide from the menu bar (essentially an open-source version of Bartender).