Mick O'Donnell's UAM CorpusTool is an open source easy to use tool that supports manual annotation of corpora across languages (also using non-western characters) with features defined by the user.
See http://www.corpustool.com/index.html
Kind regards, Stella
-- Prof. Dr. Stella Neumann Anglistische Sprachwissenschaft
RWTH Aachen University Institut für Anglistik, Amerikanistik und Romanistik Kármánstr. 17/19 D-52062 Aachen
Tel. +49 (0)241 80-96105