Knowledge may be one of the easier things to share: It obviously doesn't get less if it is shared; it needs sharing.
- tsolife.org - Travelling School of Life, a skill sharing network
- Instructables - website devoted to sharing knowledge on how to construct things
- wikiHow - a wiki designated to share knowledge on how to do things.
- libre.org - documentation center about Free Knowledge, Free Software and Free Standards (Free Knowledge Foundation)