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.
SaaSiter Contacts Importer - Allow users to import contacts into their system.
Shareaholic - Shareaholic is trusted by over 300000 brands, businesses, agencies, and individuals to grow website traffic and engagement 24 hours a day, 7 days a week.
CloudSponge - Companies from every industry use CloudSponge’s Contact Picker to get access to their users’ address books.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
AdiInviter Pro - The ultimate contacts importer and tell-a-friend system for your website.