I don't know if webportal is the right name for the pice of Software which I'm looking for. I want to publish different Intranet apps (like OWA, our Time Management Software, fileserver Access) to the Internet. At the moment we're using the webportal from the Cisco ASA, but we're not satisfied with that solution; for example many scripts are being blocked by the ASA and the performance isn't the best.
So the webportal which I'm looking for should be able to securly publish apps to the Internet, provide SSO and it would be nice to have plugins for fileserver Access or RDP. As my Budget is limited an opensource Software would be preferred.
By the way I already thought about using our Forefront TMG as "Pre-Authentication", which would work for OWA, RDP, etc. But our time managment Software uses plain html form authentication so I would loose the SSO feature (the ASA Posts the credentials to the webserver).