Open source projects using MPS? Additional language?

Hi,

1) are there currently any open source procects using MPS?

I found the C#-procect at MPSwiki page, but on the one hand it is

conceptually very similar to base language on the other hand the project has not been

updated for some time.

2) I would be interested in the additional languages like "state machine language" or "actor language"

but they are incompatible with current MPS 1.1 version.

Could someone recompile them for current MPS build?

Thank you and

Best regards

Harry