HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Boomi - The #1 Integration Cloud - Build Integrations anytime, anywhere with no coding required using Dell Boomi's industry leading iPaaS platform.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Postman - The Collaboration Platform for API Development
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.