 <p>i like hamsterdb because i wrote it :)</p> <p><a href="http://www.hamsterdb.com" rel="nofollow">http://www.hamsterdb.com</a></p> <ul> <li>frequently used with database sizes of several GBs </li> <li>keys/values can have any size you wish</li> <li>random access + directional access (with cursors)</li> <li>concurrent reads: hamsterdb is thread safe, but not yet concurrent. i'm working on this.</li> <li>if your cache is big enough then access will be very fast (you can specify the cache size)</li> <li>written in c++</li> <li>python extension is available, but terribly outdated; will need fixes</li> </ul> <p>if you want to evaluate hamsterdb and need some help then feel free to drop me a mail.</p>