Timeline of free and open-source software

This article presents a timeline of events related to popular free/open-source software. For a narrative explaining the overall development, see the related history of free and open-source software.

The Achievements column documents achievements a project attained at some point in time (not necessarily when it was first released).

2000s
By the 2000s the number of open source software packages in wide use was so large that it would be infeasible to make a definitive list.