IceNotes ME for Mobile Devices is an extremly usefull ;-) JAVA ME (J2ME) application to store all your important (text)notes on your mobilephone using "Twofish" encryption. Your notes are organized by assigning your own custom tags to your notes.
S/Key - OTP Generator for J2ME architecture. An RFC2289 compliant One-Time Password generator for mobilephone supporting Java language. It uses MD4 and MD5 hash algorithms.
SecretBox is an open-source, high-safety password manager for Windows/Linux/J2ME devices. You can build the passwords list conveniently in PC side, encrypt it by a master password, and upload to your mobile phone.