Google Talk
Call or send instant messages. Google Talk has been replaced by Google Hangouts as an add-on for the Chrome browser, but it's still available here for download.
Free calls to regular phones (+ mobile in US) over the internet
Microsoft Teams is the hub for team collaboration in Office 365 that integrates the people, content, and tools your team needs to be more engaged and effective.
Share photos, videos, music, files, documents and more between all of your devices. File sharing from phone to PC, phone to phone, PC to phone, PC to tablet.
µTorrent is an efficient BitTorrent client that is lightweight, and powerful. It offers fast downloads with automatic
bandwidth management.
Lightweight, customizable mail client
TeamSpeak offers crystal clear sound to communicate with your team and promises military-grade security, lag-free performance & unparalleled reliability and uptime.
OnionShare lets you securely and anonymously share a file of any size, without any third party involved.