Does SourceForge have a pool of maintainers that can help with projects? That's the first I'm hearing of that.

Or the Apache foundation.

Apache might be a good fit for the high profile refugees like LightTable. The little stuff, maybe a shelter model is more appropriate. JMHO.

Doesn't becoming a Apache foundation project require that you have developers? Or do they have money to pay people to work on abandon project?

If a project becomes inactive, Apache puts it into the Attic and development ceases.