Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Best Referral Programs - A curated directory of startup referral programs
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
GrowSurf - Referral software for B2C, FinTech, and SaaS companies.