With iOS 9 now being out, I've submitted (a couple of days ago actually) updates for Retro, Tip Tabulator, and Paipera. These are minor updates, but they add split screen and slide over support for the newer iPads.
Apologue's latest beta also has the split screen and slide over support. I'm hoping to have a new build this weekend with updated documentation and examples. Work on the standard library has been slow, but it's coming together.
The Passphrase Generator and Kaputi tea timer will be getting updates as well. Passphrase will have a few more options soon (specifically: the ability to set a custom separator and optional capitalization of the first character in each word). Both will be getting iPad support as well. I'm hoping to have these ready to submit early next week.