Lord of the REPLs
http://lotrepls.appspot.com/

supports multiple languages but still kinda alpha

Shell pour les langages scriptés (dont Scheme, Scala, et Python)

Doesn't look like you can automate it, though that would be awesome

another firefox repl plugin

A firefox java script REPL (uses telenet).

Welcome to your first taste of Haskell! Let's try Haskell right now! Beginners Type help to start the tutorial. Or try typing these out and see what happens: * 23*36 * reverse "hello" Learn More Real World Haskell book cover Get stuck into a book with Real World Haskell (readable online!), published by O'Reilly Media. Checkout Haskell.org for more information about Haskell.

Erlang is a programming language created in the Computer Science lab at Ericsson in Sweden in the late 1980s. The above prompt represents an Erlang shell, where you can try the full power of Erlang (well, sort of). To start this tutorial please type ok.. Please note that in Erlang every instruction must be terminated by a DOT (.), and to have it evaluated type Enter.!

"Erlang is a programming language created in the Computer Science lab at Ericsson in Sweden in the late 1980s. The above prompt represents an Erlang shell, where you can try the full power of Erlang (well, sort of). To start this tutorial please type ok.."