EventRay is a ready to use user interface kit that includes multiple layouts and UI elements specially designed for web and mobile devices. You can download the UI kit for free but you can only use EventRay for non-commercial use only.
Shakuro, an international web and mobile development company located in San Fransisco, Dubai and Montpellier just released an Android UI Kit with material design layout. If you want to use it on commercial project, you’ll need to ask them directly because they didn’t specify the license when releasing this freebie.
A nice UI kit that features a bit of transparencies making the UI Kit look modern and futuristic. Zen UI was designed and share by a Dribbble user named Virgil Pana. License is unknown, so you might want to ask Virgil first before using it for commercial project.
During the holiday season everyone is in the mood to share high quality freebies. Like this one for example, a pretty awesome UI Kit that contains 12 elements such as login form, newsletter signup form, tabs, charts and many more. The designer Thomas Budiman said that you can use this UI Kit for any purpose.
A sleek brownish UI kit consisting several elements such as media player, buttons and dropdown. This UI kit is available for free courtesy of Made By Thomas on Dribbble. The UI kit is available for free un Photoshop (PSD) format.