Theres loads but they are fiddly and time consuming. You also have tocommit to an account.
Why not use a WIZZYWIG editor like frontpage and then just paste the code into your e-mail. Thats what I do and mine look just as good as some I receive without all the annoying advertising and links for the software on them. Much more professional
Claire's right - it's not difficult to do, really ... although FrontPage does produce bloated code that could clog up the recipients inbox.
There's a company called www.constantcontact.com that give you newsletter templates to use - and a free 60 day trial.
If you're looking for a more professional list management software - and a really cheap way of sending out your newsletters, then try www.campaignmonitor.com - they're excellent. I use them, but they don't provide templates - just excellent reporting and ease of use for list management and email broadcasts.
I agree with Clare - you can create some professional-looking emails using Frontpage, with a bit of practice.
ConstantContact.com is also good and lets you send emails to a limited number of people for free. Plus when you sign up with them, they send you regular newsletters featuring hints and tips.
Have you considered the copy for these newsletters? If you'd like a free sample and a quote let me know.