GDII

4-Player Chess Admin & Dev

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4PlayerChess
Python/Qt application
Open-source (GPL-3.0)
Latest release: 0.10.0

W4PCC Teams 

2018 - 4th place (with superatos)
2019 - 9th place (with superatos)
2020 - 1st round (with Karmas_Revenge)

W4PCC Solo

2020 - 9th place

Four-Player Chess Wikibook
Share your knowledge by contributing!
(My user talk page: 4PlayerChess)