6 Upvotes
HubSpot Conversations Live chat, bots & team email -- free.
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Franz 2.0 Desktop app for Slack, WhatsApp, Skype, Telegram, Messenger
Franz Messenger for WhatsApp, Telegram, Facebook, Slack & Hipchat
f.lux Adjusts your computer's display to adapt to the time of day
Slack Be less busy. Real-time messaging, archiving & search.