I'd like to show you my first project with ethereum smart contracts. I've created a link shortener that is completely based on a smart contract and statically served from github pages. It interacts with the blockchain via web3.js.
Each shortened link costs a few milli ether. Pricing is based on key length (the shorter, the more expensive) and on the validity period.
E.g. ethr.link/hi would cost you 8 milli ether per 30 days.
Check it out: http://ethr.link
I'd really appreciate your feedback!
The whole project is open source on github (MIT license).