I'm a little confused by this. The project page makes it sound like someone's weekend project, complete with a donation link, but in fact it seems to be the client for one of SpiderOak's products.

In any case, I'm having fun reading about some of the projects used to build this, including Crypton. Will this work with any Crypton server, or is it somehow tied to SpiderOak?

Edit: "I am happy to announce that SpiderOak has acquired Encryptr" (blogs.devgeeks.org).