tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page
Twift - Send bulk DMs on Twitter without spending hours
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.
Front Twitter Inbox - Team inbox for Twitter
Crisp Chat - Multi-channel customer support software
TweetDM - Search through our 1.5 Billion Twitter profiles database and automate your DM outreach on Twitter.