Below are a list of resources that you can use to help you find a co-founder for your startup.  Ideally, you’d want to partner with someone that you already know, but that’s not always possible.  If you’re still looking for a co-founder, this list is for you.

Online

http://founder2be.com Complete a profile about yourself, select criteria for your co-founder, such as location, skills, and availability.  You can post ideas or browse other “founders to be”.

http://cofoundernetwork.com/ Closed network that links up entrepreneurs with engineers on new projects.  You will need to apply to get in

http://cofound.org/ Immediately search for the desired skillset you are looking for and contact

http://www.techcofounder.com/ Technical guys post their skills, non-technical contact them or create an ad about your startup so others can contact you

http://startuplinkup.com/ Wiki where people post up ideas, startup jobs, and services

http://www.builditwith.me/ Created to link up designers and developers.  Create a profile or contact others with ideas.

http://programmermeetdesigner.com/ Another network created to link up designers and developers.  Simply post up ads based on what you’re looking for.

forrst An invite-only community where designers and developers share their work.

http://www.weekendhacker.net/ A place where developers & designers help each other out on small projects.

http://www.mysocialventure.com/ Find co-founders, and also any other aspect of creating the beginning of a start-up.

http://matchfounders.com/ - Intended to help match founders with similar interests.

In Person

http://www.meetup.com/ Search keywords depending on what you’re looking for: ex’s) “Hacker”, “Startup”, and even “Co-founder”

http://founderdating.com/ Held once in a while, location varies

http://startupdigest.com/ – Send startup and tech events going on in yourarea.  Go to these to meet like-minded people.

http://beta.startupweekend.org/ – participating in a startup weekend can help you find others who are interested in building a startup.  Do hands-on work with other developers, marketers, designers, and product managers. (Worldwide)

http://launch48.com/ An in-person seed-camp like activity that brings both business and tech potential-founders together to build stuff and launch over a weekend.

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This is a tentative list of what we’ve compiled so far.  If you have any others please contact me or leave a comment below.  You can also try out our own free video course if you are a non-technical founder looking for a technical counterpart.  You can also catch us on twitter