LinkedIn is my primary social media marketing platform and I snapped up Breakcold because it really lets me dial in my LinkedIn contacts for marketing purposes. I really like the way you can track your contacts' posts and updates and reach out to them, all within Breakcold. I admittedly do not use Twitter much for marketing so I have not experimented much with that component, but it if works as well as the LinkedIn component, I may start to up my game on Twitter, as well. I have managed most of my LinkedIn leads in LeadDelta, a former AppSumo deal, and recently found out that Breakcold is in discussions with LeadDelta to provide an integration between the two. That would simply be awesome and really increase the effectiveness of my LinkedIn marketing. There is a Kanban-style pipeline to track sales if you approach your sales process that way and an actual campaign section for an email campaign - all within Breakcold. By far and away the most valuable feature for me is the tracking of individual contacts, since I am as much interested in "staying in the know" as much as the formal sales process. If you use LinkedIn or Twitter in your sales and marketing process, Breakcold is a good tool to add to your toolbox.