UnQLite (http://unqlite.org) is still faster than SQLite
SQLite is years old, appears to have an extensive test suite, and is used by pretty much every big name you can think of.
Can you point us at the UnQLite pages about testing and prominent users?
For something that just had its first public release, "still" seems a bit hyperbolic; also, UnQLite isn't an RDBMS, so its not a replacement for SQLite.