MMowned Java Realm Changer v2.0
Cross-OS
(Mac,Windows,Linux,etc.)
May not be the most decorated you've seen but it works. XD
Discription: Asks you what you want to change your realmlist to then asks you if you want it to start WoW
Guide: Put image and jar file in wow folder, make shortcut to MMownedRealmChanger.jar and place on desktop.
VirusTotal: