BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
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.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
LogViewPlus - Looking for a better log viewer? LogViewPlus is a professional log file viewer that can parse, read, tail, merge and analyze log files in any format. Remote log files (SFTP) and large files are supported. Easy configuration.
Better Uptime - We call you when your website goes down