(Business 2.0) - Tech is back - and the sector's fastest-growing public companies are leading the charge. During the past three years, the companies on this year's B2 100 list have increased sales by an average of 33 percent a year, stoked profits by 86 percent, and raised cash flow from operations by 83 percent. Wall Street has applauded, sending the Business 2.0 100's shares up an average of 38 percent in 2005.

The 10 companies highlighted here did even better - returning more than 100% to investors last year alone.

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Next: B2 100: See the 10 best-performing stocks

Plus: Full list: 100 Fastest-Growing Tech Companies

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Patrick Baltatzis, Saheli S.R. Datta, Joseph De Avila, Julia Feldmeier, Michael Fitzhugh, David Goldenberg, Susanna Hamner, David Jacobson, Heidi Ledford, Michal Lev-Ram, Jeff Nachtigal, Snigdha Sen, Michael Yunfeng Zhao and Moming Zhou contributed to this article.