I recently discovered a very interesting piece of Free Software: Gogs.
There are many other examples Free Software projects in China. Here is my own list.
ssdb  is a NoSQL database that combines Reddis API and LevelDB storage. It is not quite as original as Gogs or CrossUI since it combines two existing open source projects. Yet, it could create its own community and gather many industrial users inside China, but not much outside.
Taobao themselves contributed to MariaDB database the multi-master replication features. You can find in MariaDB release notes acknowledgements to Lixun Peng for this major contribution . Alibaba has also a page dedicated to all its open source activities .
I also recently discovered Zentao , an open source project management application that – sadly – relies on a Premium business model: what is sold to users is a proprietary version of the application whereas the open source version has no official commercial support. Yet, this demonstrates growing adoption of open source business applications in China.
There are also many developers of open source plugins for Chinese cloud services such as Qiniu. Klion Xu has published for example a Qiniu plugin for the ghost blogging platform . It may not be a full application but it is the sign that a new generation of young developers are ready to create further Free Software in China.
This list is only the beginning. Let us hope it will extend quickly. Please feel free to contact me email@example.com with more projects to talk about. I will make sure I write about them in my next blog.
 Gogs - http://gogs.io/
 wd-calendar - http://www.web-delicious.com/jquery-event-calendar/
 Sigma Widgets - http://www.sigmawidgets.com/
 CrossUI - https://code.google.com/p/crossui/
 Sigma Widgets Commercial License - http://www.sigmawidgets.com/buy_now.html
 Sigma Visual Ajax Builder - https://code.google.com/p/linb/
 J-UI - http://j-ui.com/
 SSDB - http://ssdb.io/
 MariaDB contributors - https://mariadb.com/kb/en/mariadb/log-of-mariadb-contributions/
 Alibaba Open Source - http://alibaba.github.io/
 zentao - http://www.zentao.net/
 ghost-qiniu - https://github.com/sanddudu/ghost-qiniu