Service is currently on standby mode, with services available to people who have the .jar. By using the services at grappl.io, you agree to not use it for any illegal purposes, and that you are responsible for anything you use the service for. Do not transmit any copyrighted material you do not have the rights to transmit using the service.

Grappl is a tool for hosting servers behind closed ports. People connecting don't have to download anything to connect to Grappl'd servers, unlike with other programs such as hamachi.

All you have to do to run it is run the .jar, choose whether you want to be logged in or anonymous, specify which port your server is bound to, and your server will be open for anyone to connect. No messing around with port forwarding.

It works by transferring data through relay servers (by default, ones on grappl.io).

The Grappl client code is released under LGPL v2.1.

Grappl is primarily developed by Ellen Hebert a.k.a. Cactose.

Her twitter is here: https://twitter.com/Cactose