[tossaway9000]

no update since August 31, 2016 seems pretty dead, though I guess there is someone around to renew the domain name, etc.

[freemint]

They haven't come around to updating the page for a while (someone lost login info or something like that) but they have a new core and some projects that use the new SH4 equivalent core. https://www.coresemi.io/

They currently seem to be in a "release tarbal" model of open source but know they ought to be in an develop on master branch in public repo model.

[TapamN]

There's some activity on the mailing list.