The Vassal module for The Greatest Day: Sword, Juno, and Gold Beaches has been updated to v1.92, specifically to work with Vassal Engine v3.4+, and is now available for download.
Check the module page for additional features and bug fixes since the previous released version (v1.8.9)

Version 9.1.0 of Star Wars: X-Wing Miniatures Game is now available for download.
Patch notes and details can be found here.

This module is required in order to be compatible with the Vassal client v3.4.1 and up

Vassal module for Duel in the Desert has been updated to v1.1 and is now available for download.

Version 9.0.0 of Star Wars: X-Wing Miniatures Game is now available for download.

Patch notes and details can be found here.

Theoretically, the client v3.3.x line should be fully supported (v3.3.2 when these lines are written), including 4k+ resolutions.

Vassal mod for Warriors of God has been updated to v2.7 and is now available for download.
This update fixes the bug causing the module to crash when using the Multi-Dice roll button, or when trying to close a log file after using the Multi-Dice roll button.

Version 1.02 of Old School Tactical Vol.1: Eastern Front 1941-42, by Flying Pig Games, is now available for download.
This update brings the module in line with the look and functionality of the modules for Vol.2 & 3. Various missing markers added (Intensive Fire, Acquiring, On Road).

Version 8.9.2 of Star Wars: X-Wing Miniatures Game is now available for download.
Patch notes and details can be found here.

Vassal mod for Up Front has been updated to v3.4.4 and is now available for download.
Updates include:
Added a Starting Setting command.
Added two new Flank Fire Counters.
Requires Vassal 3.3.1 or greater.

Vassal mod for Operation Mercury: The German Airborne Assault on Crete, 1941, by GMT Games, has been updated to v1.2 and is now available for download.

Vassal mod for Nations in Arms: Valmy to Waterloo has been updated to v1.5 and is now available for download.