Application Servers:
JBoss
Red Hat
GlassFish
Sun Microsystems
WebLogic
Oracle
WebSphere
IBM
Resin
Caucho Technology
API's and Frameworks:
FreeMarker
FreeMarker Project
Element Construction Set (ECS)
Apache Jakarta Project
Tapestry
Apache Software Foundation
Oracle Samples
Oracle
Barracuda Presentation Framework for Enhydra XMLC
barracudamvc.org
Enhydra Application Server
Enhydra.org
Expresso Components
Jcorporate
JSOS Java Servlets Office Suite
Coldbeans
HtmlLayout
braindamage
Rhino: JavaScript for Java
Mozilla Foundation