SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Archive.md - archive.is allows you to create a copy of a webpage that will always be up even if the original link is down
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
Wayback Machine - Browse through over 150 billion web pages archived from 1996 to a few months ago.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Perma.cc - Perma.