Native Instruments Guitar Rig Player comes bundled with NI’s free plugin suite. This stripped down edition still packs a ton of functionality and the great tones Guitar Rig is known for. Click here to download.
Brainworx/Plugin Alliance entry into the guitar amp simulation scene is a fantastic option with 8 well emulated amps to choose from. The free V3 Player gives you a sample of some of the presets from the paid version. Click here to download.
Voxengo Boogex is a guitar amp and speaker cabinet simulator with a versatile sound for realtime guitar processing. Get anything from jazzy cleans to heavy crunch at almost zero latency. Click here to download.
Shattered Glass Audio Ace Amp is a faithful recreation of the classic 1950’s low-wattage tweed amplifier used on thousands of records. It includes emulation of common mods to the 5 watt tweed circuit and IR based speaker modelling. Click here to download.