Free VPS on DigitalOcean, what to do with it?

I have a free vps server sitting there lonely and unused, I got it free trough a referral link and installed Ubuntu server on it a couple of months back then forgot about it. It still has $94.41 Credit Remaining, anyone got some ideas what should I do with it, something useful or at least for fun? I could create users and give you access if you want to play.