Recommended on STS list by someone.

Quoted: reQall is the best tool to integrate your memory with your life, helping you get more from life while improving your real memory. It does this by building on the easiest, most natural communications base -- your voice -- to access an intelligent, intuitive, centralized memory; letting you use whatever tool is near you --your cell phone, iPhone, the web, IM, email, text -- even Google Gadget -- to help you remember better.