I will give an example :
Let's say I'm using Firefox. Seems nice, but I want to try a different web browser.
Where do I go from here? What's this up in the corner? It's a button I can press, and when it's pressed it shows my other options. It suggets Opera, Konquerer, (whatever)

The feature : It suggests similar programs to the one you are using.
Even better : Let's say I choose Opera, all I have to do is press a button and it starts downloading Opera.

This feature would be extremely cool.

Thank you for your attention.

By the way, I'm a Linux newbie.

P.S. : My first post EVER

The KDE menu system is kinda laid out like that anyways though, isn't it? It breaks it down into different categories showing you the programs installed. Admitedly it doesn't show you all available applications based on your source list (or whatever packagemanagement depending on your distro). I don't think it could be built into the apps via KDE, as they're controlled by the software writers - I don't think the Firefox guys would go "Hey, next to File | Bookmarks | Tools, etc. lets put 'Try another browser'"

And welcome to LQ.

Use apt, yum, or any other package management system with a gui and all your dreams will come true.

Or search the net, either works.