MSI Afterburner - Tool to manage video cards. Shows video card stats (temp, GPU usage, etc.).
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.
Guru3D - Guru of 3D: PC Hardware Reviews and tests
SteerMouse - Advanced driver for USB and Bluetooth mouses.
ASUS GPU Tweak - ASUS GPU Tweak fully implements TechPowerUp’s GPU-Z analysis and monitoring features.
Logitech Options - Customisation of Logitech mouse or keyboard settings, device information, additional functionality...