Alan ViSTa is an independent developer of free virtual instrument plugins, focused almost entirely on sampled mallet and chromatic percussion. The catalog is built around sample sets drawn from the University of Iowa Electronic Music Studios' public-domain library and distributed as VST, VST3, and Audio Unit plugins for 64-bit Windows and macOS.

Releases include VibroMaster (vibraphone), Marimbaphonic (marimba), eXylo (xylophone), BellsEbuth (orchestral bells), Crotalinae (crotales), Cymbalistic (cymbal set), Hand Crash (orchestral cymbals), Chau Gongs, Thai Gongs, Clavestinas (claves), Clog Boxes (woodblock set) and Royotoms (rototoms). The instruments lean on multi-sampled stereo recordings rather than synthesis, and are offered as freeware with a scope that fills a specific gap for producers looking for tuned and unpitched percussion outside of large commercial libraries.

The project sits within the freeware VST community alongside sites like KVR Audio, Plugins4Free, and Audiofanzine, where most of the releases are cataloged and discussed. Its niche is unglamorous, utility-grade orchestral and world percussion sounds made accessible at no cost, rather than flagship synths or effects.

Alan ViSTa has 12 products cataloged on Equipboard, including Drum Machine.