77 Warlords of the Accordlands 2005. A 3.5 adaptation of the AEG cardgame based off of a former D&D campaign where high level evil PCs conquered the world.
79 Discworld. The Discworld Roleplaying Game is powered by GURPS, 1st released in 1998 using the GURPS Lite rules and callled GURPS Discworld, and then (re-)released as The Discworld Roleplaying Game in 2001, and in 2016 a 2nd Edition released using GURPS 4E. Based of course on the world of Terry Pratchett’s Discworld novels.
A dark fantasy roleplaying world of deep magic, inspired by the myths and folklore of Eastern and Central Europe. Visit today and learn more!
koboldpress.com
Arguably the most successful 3rd party 5e setting and run by the legendary Wolfgang Bauer, former chief editor of dragon magazine, it's a dark fantasy world with a few unique twists. It also includes the southlands which is a strange africa/arabia mix.
83 Mythica (2004, Olliver LeGrande as Legendary Game Studios) Mazes & Minotaurs and Revised Mazes and Minotaurs.
This is basically a fantasy version of the late bronze age eastern Mediterranean. M&M is a pseudoclone of D&D OE. it is somewhat mechanically different. It plays quite well, it's different enough to NOT feel like D&D.