Triliton is a pretty heavy shaderpack and will require you to have a decent PC to run well. The pack offers high quality visuals that makes Minecraft look much more realistic. Here's a list of effects that this pack adds :

Colored glass.
Dynamic water shadows.
Added forward rendering.
Increased FPS.
Fixed shadow bug.
Cleaner colors.
Better sunrise/sunset.
Improved water reflection.
Glare removed
Godrays disabled by default.
Vignette enabled again.

It is quite difficult to determine what the best feature in this list. All of them stand well upto one another and equally contributes to the insanely beatiful visuals that this pack offers. Take a look at the screenshots to see what you can expect from this pack.

Download links are given below.

newest

fresh

relevant

playable

legacy

Triliton's Shaders Shaders