C3 is a C alternative for people who like C, see https://c3-lang.org.
In this release, C3 generics had a refresh. Previously based on the concept of generic modules (somewhat similar to ML generic modules), 0.7.9 presents a superset of that functionality which decouples generics from the module, which still retaining the benefits of being able to specify generic constraints in a single location.
Other than this, the release has the usual fixes and improvements to the standard library.
This is expected to be one of the last releases in the 0.7.x iteration, with 0.8.0 planned for April (current schedule is one 0.1 release per year, with 1.0 planned for 2028).
While 0.8.0 and 0.9.0 all allows for breaking changes, the language is complete as is, and current work is largely about polishing syntax and semantics, as well as filling gaps in the standard library.