Nomad Projects is described as 'Find a partner in crime for your side project!'. There are three alternatives to Nomad Projects, not only websites but also apps for . The best alternative is Sideproject.xyz, which is free. Other great sites and apps similar to Nomad Projects are CollabFinder (Free) and Scrum (Paid).
www.sideproject.xyz is a Slack community aimed towards people looking for collaborators for their side projects or want to join a project. They can also promote their finished side project or ask for feedback and testers.
Build collaborative communities and groups for universities, student groups, colleges, coworking spaces, meetups, innovation centers, entrepreneurship programs, hackathons, challenges, data providers, incubators, cities, nonprofits, government and more.