GW2 Unofficial Add-on Manager
Pre-release
A simple tool to install Guild Wars 2 add-ons and check for/install updates for them. Currently, there are only three add-ons supported (the three that I use myself) - ArcDPS, GW2Radial, and d912pxy.
ArcDPS build templates currently aren't updated by this, but it's top on the list of things to fix.
Other planned features include manually specifying .dll names and having the option to remove add-ons, among others.
Disclaimer: Every user's hardware and software configuration is unique, and thus this application may work for some and not for others. This would likely be the result of a particular add-on not working on the system, and not a result of using this tool, but no guarantees. You use this tool at your own risk; the author is not liable for broken installations, bad add-ons, crashes, any negative consequences, etc.