Graphics Enhancements
Reshade
ReShade is a generic post-processing injector for games and video software developed by crosire. Imagine your favorite game with ambient occlusion, real depth of field effects, color correction and more.
SweetFX
A universal image improvement and tweaking mod, that works with almost any 32-bit DirectX 9, 10 or 11 game or application.
ENB
ENBSeries is the project of graphic modifications for games. The main idea is to allow every gamer to configure how game looks like for their own taste.
If there is no ENBSeries version for game you wish to modify, just try several available, maybe one of them will work.
injectSMAA
A small patch for Direct3D 9, 10 and 11 based games that adds SMAA support, a new post-processing anti-aliasing technique.
injectSMAA is included with SweetFX.
HBAO+
Improves upon existing Ambient Occlusion techniques to add richer, more detailed, more realistic shadows around objects that occlude rays of light.
GeDoSaTo
A utility for modifying the rendering of games. Its primary purpose is allowing for downsampling without any limitations and with high quality filtering, but it can also be used to inject various effects, hide HuDs, or even add new capabilities with game-specific plugins.
Borderless-Gaming
Play games in a borderless window mode. This may come in useful for solving performance issues in some games.
Mods
Nexus Mod Manager
Allows you to download, install, update and manage your files through an easy to use interface. It integrates with the Nexus sites to provide you with a fast, efficient and much less hassled modding experience.
Mod Organizer 2
This is a better option for Skyrim and Fallout 3 than Nexus Mod Manager. It is specifically designed for people who like to experiment with mods and thus need an easy and reliable way to install and uninstall them.
It is compatible with the nexusmods.com website and account.