Name: OSbuddy
Homepage: https://rsbuddy.com/osbuddy
Why should this be included in the repository?: It's the best old school runescape client available currently and is used by well over 50% of the community.
Is it Open Source: No
How many users do you anticipate will use this software?: Old School runescape has an average of 50k players online at one time and a large portion of them use this client since the one created by the RS team is very bad and impossible to find for linux.
Link to source tarball/zip file: http://cdn.rsbuddy.com/live/f/loader/OSBuddy.jar (pretty much the closest you can get to the source)

I've been talking with the dev of the project and he gave me permission to redistribute the program in the third party repository. He can not give out source code because it would allow for hack makers for the game to have a much easier time getting set up and cheating. Currently basing the set up I have going on the one currently in the aur (https://aur.archlinux.org/packages/osbuddy/) and I'm still in contact with the dev if any other problem arises.