bbPress.org

Hi,
Some answers from my side:
– I don’t know IPB, so no idea what’s in there, but for almost everything there is somewhere a plugin available
– website and forum share users and the environment. Again with plugins a lot can be done (e.g. my bbP Move Topics is doing one switch from one to the other and soon also the other way around)
– version 2.6 is coming out very very soon, so yes, it’s still alive ! If you want to do a test, go for 2.6 immediately on https://bbpress.org/download/

Pascal.