Show HN: My Side Project Rocks – Share and discover side projects
Tricky thing about side-projects to me is they often start as "itches" that I scratch by developing something for my use. The something may be useful to others. However, to make it useful to others requires 10x the amount of effort to "productize" it. 
A site like this could be handy if minimally viable side projects could be get feedback to gauge interest in further development.