guys what's end note exactly. I know it's a reference manager and an expensive one at that. I have a free copy of it but I've never really used it, is it worth installing?

I installed jabref through easy debian for managing my references on the N900 and PC but I don't know if it differs to the managers you mentioned since I've not used any of them. Here is a screenshot of jabref, it takes about 3 minutes to start up but once it does it is usable.