Affinity Publisher - Professional desktop publishing app
AddThis - AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers and keep them coming back.
Contenta Publishing Suite - Contenta Publishing Suite is an advanced-level and web-based publishing software solution offered by RWS that allows you to create good quality content and offers you optimized steps and procedures to publish the content successfully.
ShareThis - Grow your audience with easy-to-use sharing tools.
RebelMouse - Publishing platform for distributed content
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.