**dataset** about all the projects hosted by the Apache Foundation Research objective: To produce a **dataset** that may help to better understand software development processes used in Apache projects. Example of RQ: Which ones are the different patterns of joining and leaving Apache projects? Method: Obtain the description of all the Apache projects, maintained by the Apache Foundation. Since this description includes links to all **data** sources (and repositories) used by those projects, produce a comprehensive list of all repositories that should be visited to maintain the **dataset**. Then, do a first retrieval of **data** from all of them, update it by frequent periodic visits, and dump it in a file that can be easily shared with researchers. Apache projects use, in different projects, Git repositories, GitHub projects for issues and pull requests, Bugzilla for issues, and change requests, mailing lists, and some other kinds of **data** sources, thus all of them need to be mined.