PLT Scheme

I'm learning Scheme right now in my spare time to expand my programming ability and hopefully find use for it at work. PLT Scheme seems to be a good implementation: it has a large library, and a good cross-platform IDE. Also, the PLT Scheme user community is large and active compared to many other Scheme implementations.

There are also some cool extensions for it:

• Typed Scheme: typing on top of PLT Scheme
• DivaScheme: environment to improve PLT Scheme

And some other good links:

• Planet Scheme: a aggregation of Scheme blogs
• Keybinding 101 in PLT Scheme