NgGUI is an open source GUI system wrote by C/C++. It is portable for embedded system which based on Linux/ucLinux or VxWorks or WinCE. It can run on the framebuffer or directFB and SDL. iTerminal is a web browser based on NgGUI.
Platform: Linux, uClinux; License: GNU General Public License
Reference: https://sourceforge.net/projects/nggui/