The news that Facebook bought Instagram for a whopping $1 billion certainly provoked a strong reaction—and it’s not so much surprise as displeasure that’s echoing throughout Twitter and the blogosphere. After all, Instagram is the grassroots David—with just 13 employees—to Facebook’s Goliath (with 2,000+ people on its payroll).

In addition to privacy concerns, some users of the ultra-popular photo app have voiced fears that their beloved Instagram will become a completely different app under Zuckerberg et. al. If you’re part of this crowd, you may be in search of another app for all your photo-sharing needs. Luckily, there are plenty of Instagram alternatives to choose from, including some near-identical apps and a number of unique ones as well.

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Hipstamatic (iOS)

Hipstamatic is Instagram's more complicated, more expensive older brother. The app offers the same vintage-style effects and social network tie-ins for Facebook, Flickr, Twitter and Tumblr (and even Instagram!), but it costs $1.99 and is only available for the iPhone. However, Hipstamatic does offer you more in-depth customization features and add-ons ("Hipstapaks") that include different film, lens, gel and filter options.