The apps can be created for all major operating systems (Windows, Mac OS X, Linux) and server-side languages like PHP, Python and Ruby are supported as well.
This is actually not a new project, it was previously known as Titanium Desktop, re-branded recently and is going through a major change/improvements (which we thought it is worth re-sharing).
Apps built with TideSDK can make use of the filesystem, have an integrated database, display notifications and much more.
And, the platform has a well-documented API and an active developer community which is great for getting support.
Compatibility: All Major Operating Systems