OSDN (formerly SourceForge.JP) is a web-based collaborative development environment for open-source software projects. It provides source code repositories and web hosting services. With features similar to SourceForge, it acts as a centralized location for open-source software developers.
The OSDN repository hosts more than 5,000 projects and more than 50,000 registered users. Registered software used to be mostly specialized for Japanese use, such as input method systems, fonts, and so on, but also included applications like Cabos, TeraTerm, and Shiira. Also, since the renewal of the brand name to OSDN, some projects that used to be developed on SourceForge moved to OSDN, such as MinGW, TortoiseSVN, Android-x86, and Clonezilla.