jpf (java plugin framework)

AllBinary Platform   (Compare Project)

Mostly written in Java

License: Unknown

Vexi   (Compare Project)

Mostly written in Java

License: apache_2, gpl, lgpl

jameica   (Compare Project)

Mostly written in Java

License: Unknown

Griffon   (Compare Project)

Mostly written in Java

License: apache_2

Qt 5   (Compare Project)

Mostly written in C++

License: Commercial, GNU_Free_Documentation_License, gpl3, lgpl21

Crazy Eddie's GUI System   (Compare Project)

License: mit

Xith3D   (Compare Project)

Mostly written in Java

License: BSD-3-Clause

Ardor3D   (Compare Project)

Mostly written in Java

License: zlib_libpng

Arta   (Compare Project)

Mostly written in PHP

License: gpl3_or_later

OpenTK   (Compare Project)

Mostly written in C#

License: mit