Mattermost
Description: Mattermost is an open-source, self-hosted online chat service with file sharing, search and integration capabilities. It supports text, images, videos and custom emojis across PCs and phones with instant notifications.
Type: software
Pricing: Freemium
textPlus
Description: textPlus is a free texting and calling app for Android and iOS. It allows users to send SMS texts and make phone calls for free over WiFi. Some key features include free unlimited texts and calls to any phone number in the US and Canada, voicemail transcriptions, group messaging, and integrating your existing phone number.
Type: software
Pricing: Free