The fourth, and final, beta for the next major version of Freeciv, 3.1.0-beta4, has just been released.
The changes since beta3 are mainly bugfixes (full list).
The major changes in Freeciv 3.1 are new Qt6- and gtk4-clients, improved balance for civ2civ3 ruleset, experimental meson based build system, and a whole lot of extra flexibility to create custom rulesets.
See the summary of changes since 3.0.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 at osdn (rather than on this forum) so we don't lose track of them.