Progressiste.Net

Livemocha is a social network service where users can learn languages through audio-visual lessons, peer tutoring tools and support systems. Users can aid others in learning the languages that they are proficient in while learning other languages themselves.

Livemocha is the first major language learning tool based on social networking technologies. Lessons are provided for thirty languages; American English, Spanish (Castellano), French, Hindi, German, Italian, Japanese, Brazilian Portuguese, Russian, Mandarin, Icelandic, Korean, Arabic, Turkish, Polish, Ukrainian, European Portuguese, Greek, Dutch, Estonian, Romanian, Persian/Farsi, Bulgarian, Finnish, Hungarian, Czech, Urdu, Catalan, Swedish, Hebrew and Esperanto, which is the most recent addition. Other tools such as translators are provided for a variety of other languages.

ResearchGATE is a free social networking site[1] and collaboration tool aimed at scientific researchers from all disciplines of science. It provides web applications including semantic searching (whole abstract searching)[2], file-sharing, publication database sharing (e.g. endnote libraries), forums, methodology discussions, groups etc.

Experience Project is a free social networking website of passion-based online communities premised on connecting people through shared life experiences. With an interactive, user-submitted network of personal stories, confessions, blogs, groups, photos, and videos, the company has collected over 3.5 million real-life experiences as of November 2009. Users can join communities organized around experiences and passions and view shared experiences organized by city and region to connect and interact with people other people who share their interests, passions and experiences.