GridPort 3 (GP3) is based on J2EE/Spring Framework so workflows can be composed using core components and services. (Information provided by mthomas at tacc.utexas.edu). GridPort has very simple to use component to compose a sequence of grid jobs for submission.
Status: alpha release of GP3.0 Feb 15th.
Availability: download from web site
Prerequisites: j2ee/spring/jboss/javacog (some will come with download).
Tooling: no graph display yet.
Technology: J2EE/Spring, SOAP/WDSL, OGSI
Grid integration: JavaCoG, GT3.0, CSF, GridFTP
Portal integration: NMI POrtals/OGCE; jetspeed; HotPage 3.0