Giveaway by buttons, by comments, among all subscribers, the contest "subscribe a friend". Checking subscriptions. Statistics and uploading results to Excel.
Karmabot for Telegram - Free bot for tracking performance in chats
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.
HiStaff - Make your staff and workspace happy
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
iCliniq on Telegram - telegram bot that will get answers from real doctors
Better Uptime - We call you when your website goes down