Apache NetBeans
Parser generator to read, process, or translate structured text
A complete 3-D game development suite written in Java
Gephi the open graph Viz platform
Java/JavaFX/Kotlin Game Library (Engine)
The SpotBugs plugin for security audits of Java web applications
Cross-platform framework for building truly native mobile apps
Arianne is an engine to develop multiplayer online games like Stendhal
Cooperative multiplayer graphical RPG and adventure game
VR Adrix Java Works - Paged Lists - Action-Entity Model ...
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
iRPGUnit Testing for RPG Developers on IBM i
Helpful tools to extend the NWN Toolset
XRocket Email Tool for Sending Emails to Multiple Users
MiRDeep*
Individualizes Rolemaster creatures.
An in-progress 2D tactical RPG
Arranges alignments in a rotating cylinder