Adobe Technical Communication Suite 4.0

Free

It's a scalable, high performance, J2EE™ based server.

SolarWinds Engineer’s Toolset contains over 50 network tools.

Server solution for automatically delivering dynamic, personalized Web graphics

Macrobject Help Authoring Suite (MOHAS) is a suite of help authoring tools.

Instant Messaging (IM) server for internal and encrypted business communications.