Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
Transferslot - Easily buy and sell side-projects
Kwayet - Team chat & collaboration app, a simple way to Slack
Flippa - Flippa is a platform for trading websites.
Flow - Stop managing projects from your inbox.
buysellwebsite - Created by two California attorneys, WebsiteBroker.