IC2 Classic Mod (1.19.2, 1.12.2), (IndustrialCraft2 Classic), is an updated version the pre-Experimental IndustrialCraft 2. IC2 Classic mod adds the Industrial Revolution and is industrial based. IC2 Classic implements some IC2 Addons for itself, such as Advanced Machines or Compact Solars. Other plans are in the works.
It also supports as many addons and native compatibility with other mods, such as BuildCraft, NEI, Not Enough Item, Tinkers Construct, Waila, and many others. IndustrialCraft Classic, which is similar to IndustrialCraft Experimental but has a different core, is built around the Original Concept. It tries to be casual-friendly while still maintaining its main features.