Trotto - Open-source internal URL shortener for teams, up in minutes
SEO Audit Software - SEO Audit Software: The most powerful SEO Auditing Software for Marketing Agency, SEO professionals & Entrepreneur.
Zero Width Shortener - Shorten URLs with zero-width characters
Shorten.REST - A URL shortener API you can depend on
Marketplace Stack - A curated collection of tools for online marketplaces.
Kintegra labs - Must have tools for internet marketers!The email verifier tool can be used to validate or verify email ids, thus ensuring that any email that you send out will be delivered, rather than bouncing back.