Record MP3 lets you, without having to register, create an audio recording that you can save on your computer and/or save on their site (a link is provided). It's very simple to use, though I'm not sure what the maximum audio recording length is nor how long they keep it on their server.
Create multimedia slideshow narratives. Create stories by uploading sequenced images, typing in text, and recording original audio tracks. Free registration but requires an email address.
Free online file conversion: document, eBook, image, audio and video, music. No account necessary. Converted files are emailed to you but must be downloaded within 24 hours of conversion.
Download lots of sound effects for your projects - An important aspect of any video project is sound effects. They help bring videos to another level. The more authentic the sound effects, the better the video will end up being.
"Online Voice Recorder is a free simple application which records up to 7 minutes of sound from microphone. After recording you can trim the sound and save it to your computer."
"Simply create great music! With the freeware MAGIX Music Maker Basic Edition you can compose professional sounding songs and entire soundtracks in just minutes. Simply specify the music style, play on virtual instruments (drum computer and modern synthesizer), record your own voice and combine the selected music blocks into a perfectly harmonized song with the easy-to-use Arranger."