
Datomic
MySQL
MarkLogic Server
Valentina Server
Google Cloud Datastore
Datahike
Matisse
Oracle TimesTen
FlexQ
Zeplo.io
Visitor Queue
Zenlist
Qminder
slashQ
Buzzerr
Skiplino
DatomicMySQL - The world's most popular open source database
Zeplo.io - Message queue as service.
MarkLogic Server - MarkLogic Server is a multi-model database that has both NoSQL and trusted enterprise data management capabilities.
Visitor Queue - Better identify the companies that visited your website!
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
Zenlist - Google ads for classifieds