I made a simple Java-based desktop application that currently only displays a list of events from “Anvil Rock”, but I plan to continuously expand it at least until it displays all info available from the API and for it to be a base for others to start with:
https://github.com/robertsmieja/Gw2InfoViewer
A compiled version that is current as of posting is here:
http://www.mediafire.com/download/f7icwpj8p3u8hh0/dist.zip