List of data APIs that require no server-side auth or private credentials, and are thus good for small browser-only JS projects.
- 3taps
- App.net
- Aviary
- Bing Maps
- Requires auth: https://www.microsoft.com/maps/create-a-bing-maps-key.aspx
- Echo Nest
- Etsy
- Facebook Graph API (JS SDK allows auth via client-side)