Hollaback created a smartphone app that lets victims of sexual harassment log their experiences and post a picture of the person they say harassed them.

South by Southwest, the annual conference of thinkers and innovators, has honored two nonprofits it says are using technology in novel ways to promote social good.

The organizations, which won scholarships to attend next year’s conference, are Hollaback and Friendfactor. Three other groups that are not nonprofits also won after entering an essay content to describe their work.

Hollaback, in Brooklyn, works to fight sexual harassment by collecting personal stories of victims on its Web site. Victims are encouraged to use their smart phones to post pictures of those who engage in “street” harassment.

To making such reporting easier, Hollaback has …

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