Progress also up until recently stewarded the excellent Nativescript[0][1] project -- though it doesn't always get the most press, I maintain that it is the best non-native development mobile development kit.

Since it seems to be really hard to find this information, want to make a copy of the content of the second link ([1]):

> A New Corporate Sponsor for NativeScript

> Progress is proud to introduce nStudio as the new corporate sponsor of NativeScript. After fostering a robust open source developer community, Progress looks forward to what nStudio will bring to the NativeScript community and customers.

[0]: https://nativescript.org/blog/

[1]: https://www.progress.com/nativescript