Transferslot - Easily buy and sell side-projects
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Flippa - Flippa is a platform for trading websites.
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
BuySellEmpire - To help owners/vendors buy and sell high-quality domains/websites for a better price.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.