The first beta for the next major version of Freeciv, 3.2.0-beta1, has just been released.
The major changes in Freeciv 3.2 are gtk4-client as the default, new sdl3-client, meson as the preferred build system, and a whole lot of extra flexibility to create custom rulesets.
See the summary of changes since 3.1.x.
Source code is available here. Compiled Windows packages aren't available yet, but are expected within 24 hours.
Please report bugs you find on our bug tracker (rather than on this forum) so we don't lose track of them.