Mr. Free Tools - The Most Advanced Directory of Free Tools
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
CrazySpaceCat.com - Your Digital Tool Guide!
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
StartupResources.io - Tightly curated lists of the best startup tools
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.