Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Profile Hopper - Chrome Extension to Growth Hack LinkedIn
SaaSquatch - Delight your customers with the most flexible referral, loyalty and rewards platform. Build custom program experiences with SaaSquatch. Want your program embedded in app? No problem. Want to offer custom rewards? Sure! Like we said, we're flexible.
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Ambassador - Referral Automation, Made Simple.
Sheetsu - Turn Google Spreadsheet into API