MSI Afterburner - Tool to manage video cards. Shows video card stats (temp, GPU usage, etc.).
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
ASUS GPU Tweak - ASUS GPU Tweak fully implements TechPowerUp’s GPU-Z analysis and monitoring features.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
EVGA Precision - This program allows you to fine tune your EVGA graphics card for the maximum performance possible...
LightShot - The fastest way to take a customizable screenshot.