These aren't full IDEs but there are a lot of options for online python interpreters:
- http://www.codepad.org
- http://www.ideone.com
- http://people.csail.mit.edu/pgbovine/python/tutor.html#mode=edit
- http://portablepython.com/
- http://www.pythonanywhere.com/
- http://repl.it/
- http://www.learnpython.org/
- http://labs.codecademy.com/
- http://www.sourcelair.com/
- http://pythonfiddle.com/
