(Updated September 2013)
ClickPress – Distributs to sites like Google News and Topix.net, Gold level will also get you to sites like LexisNexis.
EcommWire – Focuses on ecommerece and requires you include an image, 3 keywords and links.
Express Press Release – Free distribution company with offices in 12 states.
Free Press Release – Easy press release distribution for free, more features for paid accounts.
Free Press Release Center – Distributes your release, offers a web page with one keyword link to your site. Pro upgrade will give you three links, permanent archiving and more.
I-Newswire – Allows for free distribution to sites and search engines, premium membership differs only slightly in adding in graphics.
Newswire Today – All the usual free distribution tools, premium service includes logo, product picture and more.
PR.com – Not only will they distribute your press releases, but you can also set up a full company profile.
PR9.NET – Ad supported press distribution site.
PR-Inside.com – European-based free press release distribution site.
PRBuzz – Completely free distribution to search engines, news sites, and blogs.
PR Urgent News – Not only distributes your release, but attempts to teach you how to write one, and even offers downloadbale samples for you to work with.
Press About – A free press release service formatted as a blog.
Press Method – Free press release distribution no matter what, but extra services based on the size of your contribution.
PRLeap – Free distribution to search engines, newswires, and RSS feeds. Fee based bumps get you better placement.
PRLog – Free distribution to Google News and other other search engines.
The Open Press – Gives free distribution for plain formatted releases, fees for HTML-coded releases.