Some databases
Notes to self.
Tokutek
Tokutek is MongoDB but allegedly with better performance for indexing and some other stuff
The direct benefits include high-performance indexing, strong compression, and performance stability – in other words, the performance stays high, even when data is larger than RAM
Read more: Link - Better MongoDB Performance | Tokutek
Hyperleveldb - a faster version of leveldb
Inside HyperLevelDB :: Hacking, Distributed
Ardb
Ardb, uses Redis protocol for accessing some fast databases, mostly leveldb.
KDr2/redis
Another one that does the same for leveldb only: