Vendors

jBASE International - Offers jBASE MultiValue/Pick multidimensional database management system, as well as jBASE Web Builder, Java and COM-based OBjEX interfaces, and jEDI middleware.
http://www.jbase.com/

OpenQM - A MultiValue/Pick database available both as a fully supported commercial product and in open source form for the GNU/Linux version. Developed by Ladybridge Systems Ltd.
http://www.openqm.com/

InterSystems Corporation - Develops, sells, and supports Caché, a high-performance post-relational multidimensional database and rapid application development environment designed for enterprise-class client/server and Web-based transaction-processing applications.
http://www.intersystems.com/mv

Rocket Software: U2 Product Family - Extended relational (MultiValue/Pick) databases, UniData and UniVerse (U2), offer high performance, scalable data management environments for embedding in vertical applications. Related tools are SystemBuilder RAD/4GL for application building, U2 Web Development Environment, and wIntegrate for terminal emulation.
http://www.rocketsoftware.com/u2

ScarletDME - Open source MultiValue/Pick database derived from OpenQM. Includes documentation and a download section, along with links for the mailing-list and IRC channel.
http://www.scarletdme.org/

Via Systems - Offers UniVision database management system integrating MultiValue/Pick database and client/server technologies in a single product. Related tools are ViaDuct for terminal emulation, WinLink middleware for Microsoft Windows connectivity, and WebWizard for Web application development.
http://www.viasystemsinc.com

Northgate Information Solutions - Supplies applications and outsourcing solutions to the public sector, human resources and corporate markets. Offers Reality, an effective MultiValue/Pick SQL-compliant database environment.
http://www.northgate-reality.com

Revelation Software - Vendor of OpenInsight and other MultiValue/Pick tools and products for Microsoft Windows and network environments, plus Java for OpenInsight (JOI) toolset for Java component-based applications.
http://www.revelation.com

TigerLogic Corporation - Offers MultiValue/Pick database management systems like D3, mvEnterprise and mvBase, plus related tools like mvDesigner for Rapid MultiValue/Pick Application Development, Pick Data Provider for .NET, FlashConnect to Web-enable Pick/BASIC applications, Omnis Studio for Rapid Application Development, and TigerLogic XDMS XML Data Management Server.
http://www.rainingdata.com/products/dbms/index.html