I built this to learn Go: <a href="https://cryptowat.ch" rel="nofollow">https://cryptowat.ch</a>.<p>It was the perfect project because it involves a lot of concurrency and networking. I'd think about projects that involve those two things.
A friend and I built <a href="http://usefixie.com/" rel="nofollow">http://usefixie.com/</a> with it to learn Go. Like artursapek's project, Fixie was a good fit because it involved concurrency and networking, and latency was critical. It was also nice that we could leverage a well-developed open source project (GoProxy).
I’m not finished yet, but I’m writing a trading bot for Steam so I don’t need to manually confirm trades if the offers are exactly what I’m looking for.