Photos: Instagram
Co-founded by Kevin Systrom and Mike Krieger, Instagram is a free iOS app that lets users take photos, give them a retro look with a number of image filters and then share them through Facebook, Twitter, Foursquare or Tumblr.

Since its launch last October, Instagram has become a popular tool for iPhone users. The six-man team reports 10 million users have added 150 million plus photos. To celebrate, Instagram launched version 2.0 with a neater interface, more filters and performance of up to 200 times faster.

Last updated September 26 2011: 12:05 PM ET
Join the Conversation
Most Popular

Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.