Texas Tribune
About 6.4 million people have visited the nonprofit news site -- which focuses on public policy, politics and government -- since it launched two years ago today. The day it attracted the most visitors (143,689 uniques) was the Monday after Texas Governor Rick Perry declared he was running for the GOP presidential nomination.

Metrics from the first two years:

On average, visitors view about five pages per visit. The site is in the midst of a fall fundraising drive, with about $10.3 million pledged so far. It's "an awful lot of money to raise in the worst economy since the Depression," writes CEO and Editor-in-Chief Evan Smith. || Previous: New Knight study identifies 3 surprising keys to nonprofit news business success