Tumblr is good for more than just entertaining videos and snarky commentary -- nonprofits are also spreading the word about their good works.
The microblogging platform is home to organizations such as the Trevor Project, which posts crisis resources, and CharityBuzz, where you can bid on cool packages for charity.
We've chosen five Tumblrs that both entertain and enable action. Check out our picks in the slideshow below.
Related slideshow: Nonprofits to watch on Pinterest.
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