Biglog is a log-structured storage system with an in-memory index. It is designed to be safe, reliable and fast (~250K updates/s). With transactions, crash-safe recovery, unlimited multi-values (ie. queues), sparse/wide columns, column-families, streaming, BLOBs, and regex searches on keys/columns and secondary indexes.
Bigdog is a wrapper for managing multiple Biglog instances, for example transactions over multiple data sets or replicas/mirrors.
Vermeer is a distributed database that uses Biglog for local storage, with live replication, redundancy and failover. It provides a low latency, high throughput message queue combined with persistent storage and pub-sub semantics.
Development has ceased. To be replaced by something better...
The original Inframail server (SMTP + POP + IMAP + NNTP + FTP + SIP + HTTP + WebDAV) is no longer available for new users. But for existing users the latest release is v8.20 of March 25, 2011. Core functionality has been replaced by Vmail (SMTP + POP + IMAP + HTTP) which uses Vermeer.
Development has ceased. When there's a Vermeer2 will use that.