- BuildCraft (Unofficial) (by SpaceToad, BuildCraft Team, legoj15 (1.21.1+ port))
- Backported (by WooleyMoley)
- Basic Nether Ores [Forge/Fabric] (by cScotPlay)
- CB Multipart (by ChickenBones, covers1624)
- CERBON's API [Forge | Fabric | NeoForge] (by CerbonXD)
- CodeChicken Lib (by ChickenBones, covers1624)
- Connector Extras (by Su5eD)
- CraftTweaker (by Jaredlll08, Kindlich, StanHebben and TheSilkMiner)
- Cucumber Library (by BlakeBr0)
- Custom Window Title (by chylex)
- EMI professions (EMIP) (by Mrbysco, ShyNieke)
- Ender Storage 1.8.+ (by ChickenBones, covers1624)
- FastQuit-Forge (by Kaleb_Langley)
- ImmediatelyFast (by RK_01)
- Item Obliterator (Modpack Utils Series) (by ElocinDev, Recon1991, UQuark)
- L_Ender's Cataclysm 1.21.1 (by L_Ender)
- Necronomicon API (by ElocinDev)
- Platform (by ItsBlackGear)
- ProjectE (by SinKillerJ, MaPePeR, williewillus, Lilylicious, pupnewfster)
- ProjectE Integration (by TagnumElite)
- ProjectExtended (by pupnewfster)
- ProjectRed Core (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Expansion (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Exploration (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Fabrication (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Illumination (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Integration (by MrTJP, Chicken Bones, covers1624)
- ProjectRed Transmission (by MrTJP, Chicken Bones, covers1624)
- Puzzles Lib (by Fuzs)
- Reborn Core (by Team Reborn, modmuss50, drcrazy)
- Scalable Cat's Force (by Kotori316)
- Tech Reborn (by Team Reborn, modmuss50, drcrazy)
- TechRebornJEI (by TheLMiffy1111)
- Vanilla Backport (by BlackGear)
- Almost Unified (by Almost Reliable)
- Architectury (by shedaniel)
- AlmostUnifiedDrops (by unilock)
- Bad Mobs (by Darkhax)
- Cloth Config API (Fabric/Forge/NeoForge) (by shedaniel)
- CraftTweaker GUI (by Bommels05)
- Curios API Continuation [Frozen] (by SSKirillSS)
- Curios API (Forge/NeoForge) (by C4)
- Distraction Free Recipes (EMI) (by Toni)
- EMI (by Emi)
- EMI Loot (by fzzyhmstrs, lxly9 (art), unilock (ports))
- EMI Ores (by Abbie)
- Enderpearl Backport (by Enjine)
- Entity Model Features (by Traben)
- Entity Sound Features (by Traben)
- Entity Texture Features (by Traben)
- Entity Culling Fabric/Forge (by tr7zw)
- FerriteCore ((Neo)Forge) (by malte0811)
- Forgified Fabric API (by Sinytra, FabricMC)
- Fzzy Config (by fzzyhmstrs)
- GeckoLib 4 (by Gecko, Eliot, AzureDoom, DerToaster, Tslat, Witixin)
- Global Packs (by JTK222)
- Improved Mobs (Forge, NeoForge) (by flemmli97)
- Inventory Sorter (by cpw)
- Iron Chests (by cpw, alexbegt, progwml6)
- Just Enough Items (by mezz)
- lionfishapi (by L_Ender)
- MAtmos ambient sound (by TCTgaming)
- ModernFix (by embeddedt)
- Modular Force Fields (by aurilisdev)
- Not Enough Crashes (Forge) (by Fudge)
- oωo (owo-lib) (by glisco, Blodhgarm, BasiqueEvangelist, Noaaan)
- Porting Dead Libs (by Thepigcat, Reclipse)
- Project Expansion (by Donovan_DMC)
- Project Time Master: Reforged (by EXPLO)
- Railcraft Reborn (by Sm0keySa1m0n, Edivad99)
- Sculk Transporting (by bl4ckscor3, Redstone_Dubstep)
- Sodium (by JellySquid (jellysquid3), IMS212)
- Sparse Structures (by MaxenceDC)
- Backported Spears (by N0t_UN_Owen/NotUnaNancyOwen)
- tctcore (by The TCT)
- TenshiLib (by Flemmli97)
- Transport Lib (by Thepigcat)
- TxniLib (by Toni)
- Voltaic (by aurilisdev, skip999)
- Balkon's WeaponMod: Legacy (by BalkondeurAlpha, HyperSpeeed)
- Xaero's Minimap (by xaero96)
- Xaero's World Map (by xaero96)
- Fast Noise (by zenxarch)