Jolla has some blobs, but it is optimise for mobile usage, and inside normal linux like N900 (it's too has some blobs).
For python/c++/QML/QT/comand line develop, of cource.

But I never try write code to GTK. Is only problem of porting Maemo/Meego software, or I don't understand any critical mean?

Is any way to try new Neo900 software in chroot in N900?

And i has additional reason: I want use smartphone with pebble smar****ch, and write some aplication for myself, may be, for another peoples(for example, Zabbix/Nagios integration notification, todo application with sync of Google mail).
May be, i can write integration between Neo900 and Pebble, but... It very difficult, i think! All my code less 1000-1500 strings by project.