TokuMX is a MongoDB distribution from TokuTek, a company headquartered in Lexington, Massachusetts (USA).
TokuMX is a drop-in replacement for MongoDB, the most popular NoSQL database. It is to MongoDB what MariaDB is to MySQL.
TokuMX is said to offer 50x performance improvements and 90% reduction in database size over MongoDB. And it has support for ACID transactions and multi-version concurrency control (MVCC).
TokuMX has an Enterprise and a Community edition. In TokuMX 2.0, the Community edition received support for better fast updates, a new Ark Election Protocol, smaller oplog entries, and geospatial indexing. The Enterprise edition received support for improved multi-directory tot backup, point-in-time recovery, and auditing.
Details about the new features for both editions are available in the official release announcement.