Keep Calm and Read the Friendly Manual :-)
Description:
Sedna is a free native XML database which provides a full range of core database services – persistent storage, ACID transactions, security, indices, hot backup. Flexible XML processing facilities include W3C XQuery implementation, tight integration of XQuery with full-text search facilities and a node-level update language.
Description:
ClickHouse® is a free analytics DBMS for big data
Description:
Acra provides application-level encryption for data fields, multi-layered access control, database leakage prevention, and intrusion detection capabilities in one suite. Acra was specifically designed for distributed apps (web, server-side and mobile) that store data in one or many databases / datastores.
Description:
JunoDB is PayPal’s home-grown secure, consistent and highly available key-value store providing low, single digit millisecond, latency at any scale