PR X VH - On demand PR campaigns for free
Promotehour - Free list of 1100+ media outlets to pitch your startup
pressfarm - Pressfarm helps entrepreneurs find journalists to write about their startups.
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.
Publicize Zero - Opening PR to the 99%
280Blue - 280blue is a go-to-market agency that works with technology companies at all stages to create new market categories or redefine old ones.