The 10 All-Time Greatest Free Downloads and Services

In our 15 years of choosing the best free stuff, we’ve spotlighted the superstars: Adobe Reader, Craigslist, Flickr, Gmail, Google, Mozilla Firefox, and Wikipedia. Here are ten other classics you might not use–but should. (For more of our favorite downloads, sites, and services–including a list of all 112 picks, arranged by category–look in the box to the right.) Ad-Aware Free : This utility is simple to use and does an excellent job of detecting and killing spyware