My work on AIssac is on hiatus for a bit while I work on other projects but I pulled out some bits I did finish and want to release them.
I just published an initial version of a screen capture library (currently OSX only). It still needs a lot of work but thought it might be useful already to anybody needing an easy way to capture their screen.
Future plans are to give more options on how to capture the screen (sub screens, specific apps, multi monitor, etc) and expand it to more platforms.
You can check it out here