Hive - Seamless project management and collaboration for your team.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
PingPong Status Pages - PingPong: incident tracking and website monitoring in one. Turn downtime into happy customers. Beautiful, fully customizable status pages hosted securely outside your infrastructure. Sign up for free today.
Better Uptime - We call you when your website goes down