Magnus Jensen (@magnuskahr@) - Mastodon

PGN Chess Editor - Apps on Google Play

Chess Analysis Board and PGN Editor - Chess.com : r/chess

Chess

Main menu — Manual

Jeremiah Fenner

GitHub - c4akarl/ChessForAll: Play chess against an engine or use the program as a PGN editor/-viewer (OS Android).

DHTML Chess

Annotating in ChessBase: creating training positions

GitHub - alex65536/Chess256: Chess 256 is a chess program for playing, editing and analysing chess games.

Reddit PGN viewer.