Minecraft version: 1.7.10 - 1.14.4
Sildur's Shaders is an extension of the GLSL shader mod for Minecraft, now part of Optifine.
Vibrant shaders completly revamps the lighting system of minecraft and adds advanced effects like volumetric lighting, bloom, ambient occlusion and reflections. While still maintaining high performance.
Enhanced default does what the name indicates, instead of completly revamping the style of the game it maintains the vanilla look and adds shadows, reflections and even godrays. It's very lightweight and highly customizable, so even the worst potato is able to run it.