Wanted to thank the UbuntuHq.com staff for adding a link to our site.
TuxSoftware.com is a web-based software delivery system for Ubuntu/Debian, the site contains the most popular well documented applications with screenshots, reviews, system requisites, and support links for each. You may install software using either the AptUrl protocol or with our own custom utility which is additionally capable of local .deb package installs. We also maintain a custom repository that contains additional packages that may not be in the Canonical supported repos, like Flock Webbrowser and Frostwire for instance.
This is a very young project that is constantly growing and we welcome any and all community suggestions. We are very commited to Free/Open Source Software and both our site and utility are under the CC-SA and GPL.