Additional information
Storage model Columnar
Open-source Yes
Available gratis? Yes
License(s) MPL 2.0
Year released 1994 (?)
In active development Yes
Focus of intended use Analytics
Kind of data Relational
Distributed Not fundamentally

MonetDB is a column-store-based DBMS, developed by the CWI DB architectures team, and the brainchild of Professor Martin Kersten.

This is a stub page, so consult WikiPedia' MonetDB description for now.

MonetDB has its own website with a lot of content, as well as a users' (and developers') wiki. It may be particularly interesting to visit the Internals section of the website, and this extremely long single page exposition of the architecture and design. And some of the APIs. And other stuff too.