I found https://launchpad.net/ there's loads of applications to choose from there it seems like all of them. You've got to add the ppa, update then install the applications. This can be pretty cumbersome if you plan on installing a few with the terminal.
Is there a launchpad application that replaces the ubuntu software centre? Does the synaptic package manager index everything in launchpad? maybe that's what I'm looking for let me know cheers :)
After asking https://askubuntu.com/questions/532226/why-dont-developers-upload-to-the-ubuntu-software-centre