TriggerFyre

TriggerFyre, part of TheFyrewire’s widget suite, is a free browser source that plays custom audio, video, and images on your stream in response to events you choose. Channel point redemptions, chat commands, bits, and other Twitch events can each be wired to a specific sound, clip, or image: you upload your media, map it to triggers in the dashboard, then drop the browser-source link into OBS like any other overlay, and it fires automatically when the matching event hits. That flexibility is the appeal — it works equally well as an automatic alert and as a viewer-triggered bit of fun.

The free tier caps how much media you can store, but in practice that’s more than enough for most setups; a paid tier lifts the ceiling if you build up a large library of triggers.