From the blog:
CatSFC
Even though we already have a lot of Super Nintendo emulator cores (well, let’s make that ‘the most amount of SNES cores out of any project’), a lot of them still had too high performance requirements for some really low-power devices out there. CatSFC is a libretro fork of SNES9x based on SNES9x 1.43. It should be a lot faster than SNES9x Next (our current fastest SNES core if you exclude PocketSNES).
The nice thing about our fork of CatSFC is that we added some stuff to it in the progress. For instance, SNES9x’s sound pre-blargg APU has always been quite bad. So what we did with CatSFC was put it in optionally. Even with the blargg APU it’s still a lot faster than SNES9x Next.
Obviously this core might only be interesting for people that have devices where power is not at a premium, like the Raspberry Pi, Xperia Play and similar low-power systems like that. The more choice the merrier.