Tools
( http://autorolltables.github.io/ )
John's Dungeons and Dragons Utilities
( http://jtevans.kilnar.com/rpg/dnd/tools/index.php )
Kobold Fight Club: The first rule of KFC is 'Yip yip!'
( http://kobold.club/fight/#/encounter-builder )
Muddle's City/Town Location Generator
( http://picastudio.com/random/cities.php )
AnyDice Dice Probability Calculator
( http://gmtools.uo1.net/map.php )
Medieval Fantasy City Generator
(https://watabou.itch.io/medieval-fantasy-city-generator)
Fast Character Generation (5e D&D)
(http://www.fastcharacter.com/)
(https://eigengrausgenerator.com/)
https://azgaar.github.io/Fantasy-Map-Generator/
Articles
Procedural Dungeon Generation Algorithm
Grand Experiments: West Marches
(http://arsludi.lamemage.com/index.php/78/grand-experiments-west-marches/)
Game Specific