Free: Black And Green Guitars
A sample library of two hollowbody electric guitars, one green and one black. The style's more indie rock than anything else, with twangy plucks, staccato and feedback for both. Green additionally gets hammer-ons and black gets behind-the-bridge plucking. All this adds up to over 1500 samples and 500 MB.
Open source, released under CC license. Requires Plogue Sforzando 1.971 or newer.