Social Media and Email Marketing Apps for Writers

I've been running across all sorts of interesting information about social media resources for writers. Here are just a few you might like.

50 Useful Twitter Tools for Writers and Researchers

Various links to or about literary agents on Twitter (with thanks to Anne Wayman at About Freelance Writing)

Top 40 Twitter Tools

And, of course, there's still blogging. Here are some apps you may find useful for converting blog posts into emailed newsletters, either for free or low cost (and it seems only fitting that I have a new LinkedIn connection to thank for providing these):

MailChimp

My Newsletter Builder

LetterPop

Silverpop

InfusionSoft

Got enough to keep you busy a while? I should think so.