FusionReactor is a commercial server monitor developed by Intergral GmbH for monitoring Java application servers such as Tomcat, JBoss and WebSphere and in particular Adobe ColdFusion, Railo, and Flex Data Services.
Among the firm's notable investments, Matrix Partners was an early stage investor in Apple Inc., Arrowpoint Communications, Digium, JBoss, JustFab, PSINet, SanDisk, Silverstream Software, TheLadders.com, Sonus Networks, Tivoli Software, Tollbridge Technologies, VERITAS Software, Vermeer Technologies Incorporated, and Xilinx.
Both JBoss and Oracle WebLogic Server are used as application servers within their environment along with various other proprietary and open source software.
Sirius provide a full Enterprise Stack which can include, but is not limited to, products such as Asterisk (VoIP), JBoss (application server), Apache (web server), Squid (proxy), OGo/Scalix (groupware), Sendmail/Cyrus (email), Samba/CUPS (file & print), OpenLDAP (directory server), PostgreSQL (database), PostGIS (geographic information systems) and Linux (operating system).