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.

lmctl - lmctl is a software that let you control and customize your logitech mouse.

Argus Monitor - Argus Monitor is for monitoring and analyzing the temperature and the health status of the hardware parts of the system.

UCR: Universal Control Remapper - With today’s release of the Universal Control Remapper, users can now customize their keyboards, mice, and other peripherals for most platforms with a few clicks of a button.

Open Hardware Monitor - Monitors temperature sensors, fan speeds, voltages, load and clock speeds, with optional graph.

Gnome15 - Gnome15 is a suite of tools for the Logitech G series keyboards and headsets, including the G15...