American Evaluation Association (EVAL)
http://www.eval.org/EvaluationDocuments/progeval.html

The Program Evaluation Standards, adopted by EVAL.

Deutsche Gesellschaft für Evaluation (DEGEVAL)
(long link, click here)

The Program Evaluation Standards, adopted by DEGEVAL, the German Association of Evaluators (in DE).

Société Française de l’Évaluation (SFE)
http://www.sfe.asso.fr/fr/charte-sfe.html
Charte de l’évaluation des politiques publiques et des programmes publics (in FR, EN, DE, ES)

Société suisse d'évaluation (SEVAL)
http://www.seval.ch/en/standards/index.cfm

The Standards adopted by SEVAL, the Swiss Evaluation Society (in EN, FR, DE, IT)

The Australasian Evaluation Society (AES)
http://www.aes.asn.au/about

Various documents issued by the ethics committee of the AES (follow the menu 'Ethics')

UK Evaluation Society (UKES)
http://www.evaluation.org.uk/Pub_library/Good_Practice.htm

The good practice guidelines, adopted by UKES.