The European Council of Skeptical Organisations (ECSO) is an umbrella of skeptical organisations in Europe. Organizations within this list have different level of co-operation with ECSO.

ARP-SAPC

Rational Alternative to Pseudoscience – Society for the Promotion of Critical Thinking
Countries of operation:
Founded: 1986 | Web page: link | ECSO status: Founding member
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CICAP

Italian Committee for the Investigation of Claims of the Pseudosciences
Countries of operation:
Founded: 1989 | Web page: link | Email: link | ECSO status: Since ?
more info...