Plumm is described as 'Single collaborative customer support dashboard for all of your projects. Chat with your customers and your team members using single workspace. If it's an email sent to firstname.lastname@example.org or a chat request from yourproject2.com, it all goes into the same Plumm inbox' and is an app in the Business & Commerce category. There are more than 100 alternatives to Plumm for a variety of platforms, including Online / Web-based, Android, iPhone, Windows and Mac. The best alternative is Thunderbird, which is both free and Open Source. Other great apps like Plumm are Discord (Freemium), Element (Free Personal, Open Source), Jitsi (Free, Open Source) and Slack (Freemium).
Gitter is a chat and collaboration tool for developers and users. It's a place for developers to talk. KEY FEATURES - Unlimited public chat rooms for free - Unlimited and searchable chat history - Unlimited integrations - Private chat rooms free up to 25 users
ProProfs Help Desk Software is a feature-rich issue tracking software that enables online businesses to track all customer issues, requests, and bugs. Offer timely response to your customers through child tickets.
Kosmi is a free real time application and communication platform that offers voice, text and video calls along with games and applications such as SNES Party, NES Party, OpenArena, Poker, Virtual Cardtables, Synced YouTube and Cowatch Video.