Free Online Podcast Creation Tools

Gcast

Blubrry 

Odeo 

Audacity - This tool is not web-based, but it is free.  It has to be downloaded and installed on your computer.  You will also need to download the LAME plug-in in order to convert files to mp3 format.

Podomatic

Vocaroo - Create audio recordings - embed the recording in your blog or site

Podbean - free podcast hosting site

Voicethread - not really podcasting, but a really cool way to record voice while showing images

Creative Commons (Copyright Friendly) Music for Use in Podcasts

Jamendo

Podomatic Scenes

Jamglue - mix your own music

Where to Find Sound Effects

Best Places to Find Public Domain Images/Sounds

Copyright Friendly Music and Sounds (Joyce Valenza's wiki)

Free film music for students by Moby

Soungle - sound effects and clips

Soundsnap - download up to 5 sounds per month for free

Freesound

The Recordist

Sound Board

Partners in Rhyme - free music loops and sound effects