Warmux – An old Worms clone project (2016)
github.com
github.com
http://github.com/albertz/openlierox | http://www.openlierox.net/
I really hesitate to call it dead but the truth it that I (as well as the other devs) really have almost no time since the last 5 years or so to work much on it. Of course, any contributions are very much welcome, and I am very happy to guide any development.
Also the original Liero, and OpenLiero / Liero 1.36:
OpenLiero was done by Erik Lindroos (Gliptic), who was one of the main developers of Gusanos (http://gusanos.sourceforge.net/), another very cool Liero clone, very much more flexible with Lua scripting and very cool graphic effects such as lightning, which is unfortunately also dead. But it lives on in OpenLieroX. We merged the code bases a while ago.
And of course, much more famous now but similar game spirit, is Teeworlds: