ECSO co-ordinates activities of European organisations and individuals that aim at critically investigating pseudo-scientific statements and claims regarding observations of paranormal phenomena, and to make the results of its investigations know to the broad public. It continues the series of European skeptical congresses established earlier and supports a biannual congress and a symposium every other year.
Source: ESCO Profile
The mission of the Guerrilla Skepticism editing team is to improve skeptical content on Wikipedia. We do this by improving pages of our skeptic spokespeople, providing noteworthy citations, and removing the unsourced claims from paranormal and pseudoscientific pages. Why? Because evidence is cool.
Source: Guerrilla Skepticism