upscaledb is a very fast key/value store with a new focus on blazingly fast built-in analytical functions.
All closed source PRO features are now freely available:
upscaledb is free for non-commercial use. Commercial licenses are available.
The documentation was rewritten, and the about page explains the architecture and the unique features of upscaledb.
Visit http://upscaledb.com for more information and for an upgrade guide!
I will continue to monitor the old mailinglists (hamsterdb-users, hamsterdb-announce), but will move all future announcements to the new lists (see http://upscaledb.com/support.html).
Christoph