HiT Software, Inc.
HiT Software develops high performance relational database access products for web and client/server applications including .NET, ODBC, JDBC, and OLEDB SQL middleware products for IBM DB2 server access; Allora XML-RDB transformation middleware; DBMoto data replication for relational databases including DB2, SQL Server and Oracle databases as well as others; and SafeConduct data security for new and legacy application access across the Internet.
http://www.hitsw.com/

Message Oriented Middleware - InterPlay
Message-Oriented Middleware (MOM) product for Microsoft Windows application developers, providing messaging capability between applications via a powerful ActiveX component.
http://www.edt-wn.com/products/activem/

SearchMiddleware.com
Find the latest information on service-oriented architecture (SOA) technology, Web services, application integration, SOA implementation and governance, and more.
http://searchwebservices.techtarget.com/

Easysoft Limited
Easysoft ODBC, JDBC and XML drivers let you access Oracle, SQL Server, Access, InterBase, Sybase, Firebird, RMS, ISAM, Coda and Linc from Windows, Unix, Linux, Mac OS X and OpenVMS.
http://www.easysoft.com/homepage/main.phtml

Prolifics
Developers of Panther, a middleware development tool.
http://www.prolifics.com

Legion
Generic middleware for creating a worldwide virtual computer.
http://legion.virginia.edu/

Sankhya Technologies
Sankhya Technologies is a Software Research and Development Company. Sankhya offers Teraptor range of embedded design products and the V-One range of business management software and related services
http://www.sankhya.com/

Cape Clear XML Development
Workday provides on-demand HR and Financial Applications
http://www.capeclear.com/

OpenEJB
EJB container, pluggable into commercial middleware servers. [Open Source]
http://incubator.apache.org/openejb/

MQSoftware
Software, education and consulting for IBM WebSphere MQ messaging middleware environments.
http://www.mqsoftware.com