If you are looking for a co-founder or just wanting to talk to people who could help, these should get you started.
CoFoundersLab
Manage your entrepreneurial identity. Build and engage with your network of entrepreneurs. Access knowledge, resources and certifications.
Founder Dating
Where founders meet
Posyt
Anonymously share ideas. Swipe through related ideas and articles. Chat when it's mutual. Meet all the people you ought to know.