Thanks guys for the answers.
Well, I want to have Dropbox (or an alternative) to sync files between my office and home macs. I have a work directory on both of them and I tend to work on both machines. Dropbox does the job, but it does it via cloud and it has limited storage. So I need to avoid that.
And I would find it handy to click the "Do Sync" button instead of having constant syncing. With Dropbox you can enable/disable the sync. And I also find it rather slow.
Can Airdrop syn across the web?
Cubby look interesting, will check it out.