For the second year running, GitHub is calling all San Francisco developers to get their dodgeball on for a good cause.

The Second Annual GitHub Dodgeball Invitational will take place Sunday, Nov. 11, 2012. This year, 24 teams of 10 to 12 members each will compete; each team will need to rustle up a $3,000 donation to participate.

The money goes to a few local charities, including two San Francisco writing and literacy programs, our city’s public libraries, and the Second Harvest food bank.

At last year’s event, Heroku bested all the other teams, who came from “it” startups like Twitter, Twilio, and their ilk and who collectively raised $57,000 for charities.

“This year we’re going bigger, with more teams and more donations,” declared GitHub on the event page.

“We’ve even paired up with the folks from the World Dodgeball Society to help make this year’s tournament more awesome than last year!”

The invitational takes place at the Soma Rec Center at 6th Street and Folsom Street. Tournament play starts at 1:30 p.m. and run for three hours. Finals start at 5 p.m., with an awards ceremony at 6 p.m. and an afterparty starting promptly at 7 p.m.

And y’all better dress to impress. Check out last year’s photo gallery for fashion cues:

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