added new entries

games/framework/_toc.md

@@ -48,6 +48,7 @@
 - **[Superpowers](superpowers.md)** (Typescript, ISC, mature)
 - **[Terasology](terasology.md)** (Java, Apache-2.0, mature)
 - **[Urho3D](urho3d.md)** (C++, AngelScript, MIT, mature)
+- **[VASSAL Engine](vassal_engine.md)** (Java, LGPL-2.1, mature)
 - **[Vega Strike](vega_strike.md)** (C++, GPL-2.0, mature)
 - **[WorldForge](worldforge.md)** (C++, GPL-2.0, mature)
 - **[ZGameEditor](zgameeditor.md)** (Pascal, MIT, mature)

games/framework/vassal_engine.md

@@ -0,0 +1,17 @@
+# VASSAL Engine
+
+_Game engine for creating electronic versions of traditional board and card games._
+
+- Home: http://www.vassalengine.org/, https://sourceforge.net/projects/vassalengine/
+- State: mature
+- Download: http://www.vassalengine.org/download.php, https://sourceforge.net/projects/vassalengine/files/
+- Platform: Windows, Linux, macOS
+- Keywords: eingine, board game
+- Code repository: https://svn.code.sf.net/p/vassalengine/svn/ (svn)
+- Code language: Java
+- Code license: LGPL-2.1
+
+Quite a few [VASSAL modules](http://www.vassalengine.org/wiki/Category:Modules).
+
+## Building
+