oooohhhhhh I am really looking forward to everyone's cool tools.
I just played around with the samples on Quandry for a ridiculous amount of time. And the Pattern Library is so cool!
Like several folks, I also love Audacity.
My newest fave site for color inspiration is Design Seeds (http://design-seeds.com)
My team has a subscription to eLearning Brothers, which is a great paid resource, but I also find myself using a lot of free resources for images and sounds to supplement that.
I wrote a blog post not long ago about copyright and had a great list of sites including:
creative commons (search.creativecommons.org)
wikimedia commons (commons.wikimedia.org/.../Main_Page)
the internet archive (https://archive.org/index.php)
There's also a little tip in there for using Google images.
abnederveld.com/.../dont-be-a-thieving-jerk