Lix is a version control system that manages both files and SQL tables in a single repository, supporting branching, diffing, merging, and rollback for both data types. It enables real-time collaboration and can be embedded in applications or connected to servers, addressing the limitation of traditional version control systems that handle files but not application data.
VoltDB is a commercial in-memory DBMS offering ACID-compliant NewSQL functionality optimized for OLTP queries with distributed architecture via sharding and replication. Originated from the H-Store research project at Brown University and MIT, it launched as a Boston spinoff in 2009 and now exists in both commercial and open-source versions, though the original source code is no longer publicly available.
Apache Cassandra 6 introduces Accord, a new protocol enabling native ACID transactions without compromising scalability or availability. Accord uses leaderless distributed consensus with hybrid logical clocks and a reorder buffer to coordinate multi-row operations across replicas efficiently.