Cardcraft's Ultraplayable Shaders
Cardcraft's Ultraplayable is an edit of the BSL shaders. The creator of this pack, Cardcraftoftwitch, edited the BSL shaders to make it give decent graphics on low end systems with good performance. And I should say, this is a job well done. The graphical enhancements are something that I would term as clean. This is because the graphics are sharp on point without any unnecessary heavy effects. The "ultraplayable" in the shaderpack's name stands for the decent performace that this pack offers you. Take a look at the screenshots to see what you can expect from this pack.
This pack is compatible with both Optifine and Iris shaders.
Download links are given below.
Follow the procedures described below to install this shaders into your game
1) Install latest version of Optifine or IrisShaders
2) Download the shaders
3) Move into .minecraft/shaderpacks folder