There are 2 repositories under fridaynightfunkin topic.
Just psych engine, but bit different. Feel free to suggest ideas in discord
A port of Friday Night Funkin' v0.2.8 made by rebuilding the code via reverse engineering.
MythsList Engine is a Friday Night Funkin' engine that changes the gameplay of the original game like other engines and I guess that's it.
A fork of FNF's Kade Engine that combines its QoL features with true mod support and new gameplay enhancements
Sarvente's Mid-Fight Masses - The Definitive Release
𝚃𝚑𝚎 𝙼𝚘𝚜𝚝 𝙾𝚙𝚝𝚒𝚖𝚒𝚣𝚎𝚍 & 𝚁𝚎𝚠𝚛𝚒𝚝𝚝𝚎𝚗 𝙵𝚛𝚒𝚍𝚊𝚢 𝙽𝚒𝚐𝚑𝚝 𝙵𝚞𝚗𝚔𝚒𝚗' 𝙴𝚗𝚐𝚒𝚗𝚎!
a Friday Night Funkin mods. Freshly forked from Kade Engine which is a mod of the vanilla FNF. We have features, songs, weeks, stages, characters added here yay!
FNF# is a friday night funkin engine that acts as a spiritual successor to UFNF and NUFNF designed to be easy to mod and really customisable.
Psych Engine fork adding AWESOME and EPIC stuff
A Friday Night Funkin' Modpack, including more than 25 mods!
fnf agoti mod ported to web with bonus songs!
(unofficial) A work-in-progress Go implementation of Friday Night Funkin' v0.2.7.1 + improvments
Friday Night Funkin in GDevelop for the easiest moddin' and good optimization!
This engine, which is a modification of Friday Night Funkin', fixes various problems of Friday Night Funkin'.
Simple FNF engine clone using ActionScript. Programmed like it's 2002!
nekoEngine SourceCode
A fanmade oneshot mod dedicated to Saruky's OCs - Why is this even on GitHub💀
Recreation of Friday Night Funkin' using Löve2D, copped code and a shit ton of libraries.
Convert Friday Night Funkin' charts to StepMania and back
Convert entire FNF mod to StepMania songpack
Psych Engine except the cutscene engine works on Mac (NOT WORKING)
An engine that fixes inputs, makes for easier modding and features shaders
A module for serializing data from the Friday Night Funkin Game!