1) The Streamlabs OBS Media Library
Streamlabs OBS comes included with the largest library of stream overlays and alerts in the world. It's 100% free an can be installed into your broadcast software with one click.
To install alerts from the Streamlabs OBS Media library:
- Install and Open Streamlabs OBS
- Click on "Themes" and the "Widget Themes" Tab
- Browse to find your favorite alert overlay
- Select any matching widgets, and click "Install"
All of your alerts and overlays will be imported into your editor, and can be moved and resized from there.
2) Other Resources Online
Some links to find cool gifs for your alerts in no particular order.
Create your own GIFs
Sound Effects