What is Reddit's opinion of Octopi?
From 3.5 billion Reddit comments

➔ Octopi website

By popularity on Reddit, this Service is:

#40 in Package Manager apps

#23 in Software Installer apps

1 review of this app found across Reddit:

Octopi
http://octopiproject.wordpress.com/screenshots
https://aur.archlinux.org/packages/octopi/

Command to install it (assuming you ticked the box for AUR support on install):
> yaourt octopi --noconfirm