If your Project is Open Source,
1. Use Github & Github Pages [ .github.io subdomain / Recommended]
2. Use .TK , .GA , .CF , .GQ , .ML etc. [Not Recommended]
3. Use a Subdomain with a Free Host [ Profreehost.com offers many subdomains / recommended]
4. [ HOT ] Use .OOO domain ( 1st year free, No...