What are some alternatives?
When comparing Shortlist Metrics and Postaga, you can also consider the following products
Dibz - Put your link building efforts on autopilot
Cilantro.io - The Best Damn Link Blogging Platform (built on Evernote)
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.
Automated Link Building - A WordPress plugin to set SEO friendly links automatically