Many people donate time to help others.
Voluntaria points at ways you can use time spent online to help voluntary organizations. One organization specializing in volunteer activities is Hearts and Minds . It is important to reflect on the values and ideologies behind volunteer activities. DonParagon's Vision of the Future describes how interrelations between people are moving beyond enforced compliance with laws and rules towards voluntary compliance with the principle of mutual agreement. If you are looking for things that are free, the Free Stuff pages at Optionality Discussions have many links to things that are free, as well as links to further sites with Free Stuff.