Can the Haskell people help me refresh my memory?

I remember running a Haskell interpreter on an HP Jornada running Jlime Linux. It was a long time ago in high school and I felt it was great because I thought it was a convenient way to do math classes since I could input some math formulas directly into the interpreter pretty much as they were. Definitely better than the Cassio scientific calculator my math teacher had us use.

It ran from a CF card so there was no chance it was as big as GHC. I can't seem to find the name of the interpreter.