Open Smash Attacks, more commonly known as Open SA, is a Brawl moveset viewer.
As a moveset viewer, OpenSA is significantly more advanced than its predecessor, Project Smash Attacks; it can view the actions and hitboxes of most props and projectiles, can open character files that PSA has trouble with, and can work with the file that houses general actions for all playable characters. Its main downfall is that it cannot edit files, and there remain facets that elude it (such as Pikmin hitboxes).