Animoto - automated slideshow (30 sec.)
http://animoto.com
Audacity - download program for audio recordings
http://audacity.sourceforge.net/
Blogger - blogs (chronological web postings)
http://istenets.blogspot.com/
PB Works - wikis (easy, quick webpages; collaborative)
http://pbworks.com/
CmapTools - concept mapping; webbing
http://cmap.ihmc.us/conceptmap.html
MyWebspiration - online beta version of popular Inspiration (may not stay free!)
http://mywebspiration.com/
Bubbl.us - quick webbing/concept mapping
http://www.bubbl.us/
Google Earth - download program for places on earth, in oceans, & space (AMAZING!)
http://earth.google.com/
Google Maps - mapping locations; directions; satellite imagery, etc.
http://maps.google.com/
Jing - download program for on screen recording (5 min. free)
http://www.jingproject.com/
SurveyMonkey - Online survey (10 questions/survey free)
http://www.surveymonkey.com/Default.aspx
Zoomerang - Online survey (30 questions/survey free)
http://www.zoomerang.com/
PollEverywhere - quick, live polling (via texting)
http://www.polleverywhere.com/
Rubistar - find, create, modify, save rubrics
http://rubistar.4teachers.org/index.php
Aviary - online drawing, photo editing, and more! (may not stay free!)
http://aviary.com/
Scrapblog - online scrapbooking or presentations
http://www.scrapblog.com/
VoiceThread.com - online presentation or collaborative sharing/discussing of images, etc.
http://voicethread.com/#home
Wordle - visual prose (summary)
http://www.wordle.net/
Others...
Vimeo - upload/show videos - high quality... NOT YouTube
http://www.vimeo.com/
Zamzar - converts files (Ex. .docx to .doc) or YouTube videos to a downloadable file (NOTE: ads can be annoying!)
http://www.zamzar.com/
Reqall - call for reminders via emailed transcription of your voicemail
http://www.reqall.com/