Numverify - Global phone number validation and lookup API
Four Hour Book Club - 300+ Books recommended on the Tim Ferriss Show 📚
Antideo - Email, IP address and phone number validation API service
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
RealValidito - Phone Validator | Free Phone Number Validation & Phone Number Lookup Service | Realvalidito
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes