This isn't everything. Always keep searching.
Seed-DB - Large list of seed-level accelerators that feeds off the crunchbase API. See which accelerators are accepting applications here.
MassChallenge - Massachusetts-based non-profit accelerator. What's interesting is they don't take an equity stake in your company.
Founders Institute - Through our part-time entrepreneur training program, you can launch a company with guidance and feedback from experienced startup CEOs - while not being required to quit your job.
Lean Startup Machine - Lean Startup Machine is a workshop & educational series that focuses on teaching some of the principles discussed in Eric Ries's book, The Lean Startup.
Startup Weekend - Startup Weekend is a global network of passionate leaders and entrepreneurs on a mission to inspire, educate, and empower individuals, teams and communities. Startup Weekend travels to cities all over the world.