J2ME Memopad is a simple MIDP application designed to allow storage and retrieval of notes. It will have the ability to search and generate a list of results, as well as categorize your memos. The basic design of the memopad is similar to the Palm.
OpenNabu is a standalone personal wiki, featuring fast and simple content creation combined with highly customizable HTML export. All information is stored in plain text files and no additional server or database is needed.