Best Referral Programs - A curated directory of startup referral programs
Felt for iPhone - Handwritten cards for the modern world
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
GrowSurf - Referral software for B2C, FinTech, and SaaS companies.
Token - One ring to replace your keys cards and passwords