Snippely - Snippely is a basic text and code organizational tool.
Padlet - Visual boards for organizing anything.
Zeal - Zeal is an API Documentation Browser.
Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.
Devhelp - Devhelp is a GTK+/GNOME browser for API documentation; it works natively with gtk-doc (which is the...
Popplet - Popplet is the simplest application to capture and organize your idea.