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I've gathered together some tools for programming the P2 FPGA and bundled them with a very simple IDE as "spin2gui". You can find the most recent release at:
This should also work on the P2-ES, but obviously we haven't had a chance to test it yet. In the meantime, it does work on P1 as well, so you can test it out there (under Commands > Configure Commands... hit either "P2 defaults" or "P1 defaults" to switch between the two processors).
The compiler included with spin2gui is called "fastspin", although someday that name should change, because it now supports not only Spin but also BASIC (see docs/basic.md) and a little bit of C.
Thanks for the link to "spin2gui". I have downloaded and installed it. I am anxiously awaiting for my P2-ES board.