Nas, the rapper and general partner at Queensbridge Ventures is today's guest DJ on Product Hunt, a discovery tool for apps and other technology. Ten startups are listed under "Products Nas finds interesting and important."

Two years ago, students at ITP, NYU's "high-tech funhouse," built a fake Kickstarter to warn viewers about the possibility that crowdfunding platforms might eventually be used for warfare. That bit of online performance art turned out to be prescient. Earlier this week, a campaign on Crowdtilt successfully raised $22,000 to buy battle gear for the IDF's 97th Battalion, according to the description on the site.

"Run for the hills. Leave now. You have to find shelter. They have a cheese sommelier."

A startup called The Dating Ring has taken its inspiration from an unlikely source: the "comfort women" of World War II. How else can they explain this crowdfunding campaign to help fly New York women "in dateable ages" to San Francisco to service the Bay Area's soldiers of code.

How does a technologically savvy city respond to rising crime rates? By crowd-funding itself a private security detail.