There's also Leksah http://leksah.org/ http://leksah.org/ . I used this a bit a few years ago. It does on-the-fly recompiles, reports errors, and shows type sig

There's also Leksah http://leksah.org/ http://leksah.org/ . I used this a bit a few years ago. It does on-the-fly recompiles, reports errors, and shows type signatures.