Heroes 3.5: In the Wake of Gods Portal > HeroWO: open source implementation of HoMM 3 in JavaScript
HeroWO: open source implementation of HoMM 3 in JavaScript

A new HoMM engine has recently emerged, this time written for browsers and with features rivaling VCMI and fheroes2.
- Fully parallel multiplayer (one player’s turn or combat don’t lock out everyone)
- Flexible combat (any number of heroes, dimensions and stacks per hero)
- Maps with the unlimited number of levels
- Tri-state fog of war (added “terrain explored” state)
- Focus on modding and extensibility
- Potential support of HoMM 2 as well as other classic TBS
- Replays, spectator mode and many more
Project’s web site is herowo.game (try playing the Tutorial).
Current version is very bogus and works slowly but the project is actively looking for beta-testers and skilled contributors!
Source: https://www.celestialheavens.com/herowo-open-source-implementation-of-homm-3-in-javascript