Free Online Resources

All these resources are free, although some sites do have pay options too.

http://www.specialdutch.com/ songs, stories etc
http://www.2bdutch.nl/

Grammar

http://www.dutchgrammar.com/Registration required for exercises
http://www.dutch.ac.uk/beginners.dutch.grPublish Postammar/index.php
http://www.lauraspeaksdutch.info/
http://www.learndutch.org/
http://dutchlanguage.rietvink.com/
http://www.languagetrav.com/dutch/index.shtml
http://www.learndutch.nu/
http://www.dutchtoday.com/

Vocabulary

http://www.memrise.com/ Registration required
http://www.jekanmewat.nl/
http://www.livemocha.com/
http://www.forbeginners.info/dutch/ vocabulary lists
http://www.qedoc.org/en/index.php?title=Dutch_Vocabulary_Trainer - download (Dutch was on page 16 for me with 100 per page) or launch from the site (requires java)
http://www.qedoc.org/en/index.php?title=Planeten_Quiz
http://users.skynet.be/bd/voc/ndls/
http://mediatheek.thinkquest.nl/~kl044/tmain.htm with sound
http://www.digitaldialects.com/Dutch.htm
http://www.bbc.co.uk/languages/other/dutch/guide/ with sound
http://www.livemocha.com/
http://www.transparent.com/language-resources/free-software.html?l=dutch
http://www.pronunciator.com/English/Dutch/index.html with sound

Other Useful Resources

http://www.acapela-group.com/text-to-speech-interactive-demo.html

Update:

http://www.pronunciator.com/ includes voice recognition
http://www.heardutchhere.net/LearningDutch.html
http://www.lingq.com/
http://en.wiktionary.org/wiki/ - good for looking up parts of verbs etc
http://www.specialdutch.com/ stories and songs in Dutch
http://www.dutchpod101.com/ some free, but some pay only