I've created a list of free multimedia resources for teachers. Some quick research has shown me that there are already some excellent lists of resources out there, but for a variety of topics. This list is intended to compile those lists into one location.
Here's a list of open source software some of which is useful for multimedia
Some great examples of free audio to be used within student projects:
Free audio mixers/editors:
Free image editors:
http://docs.google.com (create a new document => drawing)
Creative commons & free pictures:
http://www.google.ca/imghp?hl=en&tab=wi (advanced settings then "filter by license", change to labelled for reuse)
http://en.wikipedia.org/wiki/List_of_video_editing_software (not all of these are free, but many are)
David is a Formative Assessment Specialist for Mathematics at New Visions for Public Schools in NYC. He has been teaching since 2002, and has worked in Brooklyn, London, Bangkok, and Vancouver before moving back to the United States. He has his Masters degree in Educational Technology from UBC, and is the co-author of a mathematics textbook. He has been published in ISTE's Leading and Learning, Educational Technology Solutions, The Software Developers Journal, The Bangkok Post and Edutopia. He blogs with the Cooperative Catalyst, and is the Assessment group facilitator for Edutopia. He has also helped organize the first Edcamp in Canada, and TEDxKIDS@BC.