MSI Afterburner - Tool to manage video cards. Shows video card stats (temp, GPU usage, etc.).
SpeedFan - Hardware monitor for Windows that can access digital temperature sensors located on several 2-wire SMBus Serial Bus. Can access voltages and fan speeds and control fan speeds. Includes technical articles and docs.
Geforce Experience - GeForce Experience is a new application from NVIDIA that optimizes your PC in two key ways.
Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.
EVGA Precision - This program allows you to fine tune your EVGA graphics card for the maximum performance possible...
smcFanControl - [Download] smcFanControl 2.