SQLite powers Android storage

http://developer.android.com/guide/topics/data/data-storage.html

A subset of SQLite was in HTML5 as the local storage engine until just recently. Now they have switched to Indexed DB

http://www.w3.org/TR/IndexedDB/

Here is the Mozilla team's article on that.

http://hacks.mozilla.org/2010/06/comparing-indexeddb-and-webdatabase/

Basically, anywhere you would have used a .mdb in the past, you would use SQLite now.