PR X VH - On demand PR campaigns for free
Press Hunt - Press Hunt saves you hundreds of hours by aggregating data on almost 400,000 journalists and reporters in one place, complete with their writing interests and contact info.
pressfarm - Pressfarm helps entrepreneurs find journalists to write about their startups.
Anewstip - Find journalists by what they tweet
Publicize Zero - Opening PR to the 99%
Promotehour - Free list of 1100+ media outlets to pitch your startup