Microsoft Recite is a Application Program for WIndows Mobile, that makes user to search in voice recording. You need to just speak your mental note and store it. Later, when you need the information just search and retrieve the audio clips containing specific said phrase.
Microsoft Recite’s voice search makes it easy to retrieve your stored thoughts and notes by using voice pattern matching. It analyzes the patterns in your speech and finds matches between two recordings — the notes you stored on your phone, and the search you do using your voice. With Recite you can store thousands of spoken notes, and then later retrieve the notes you want based on a match with your search term(s). This is different from speech recognition, which has to accurately convert spoken words to application-readable input.
Microsoft Recite is a free download for Windows Mobile devices (version 6.0 and higher). Simply direct the browser of your Windows Mobile device to http://recite.microsoft.com/download.