Telegram for Windows.
Surveillance, also presented sometimes to the user as Telemetry, Analytics or Targeted Advertising - is a feature of collecting personal information, or information about the use of the software by the company that provided the software. Or sometimes even, by a third party like Google Analytics or ID.me. The company may try to justify such a malicious behavior by pointing the user on the immediate benefits of the surveillance. Like: "You will get ads specifically chosen for you". This is just a tactic to ease the fact that you are being watched. More about surveillance you can see on GNU.ORG/MALWARE.
Mobile phones are not software but they have inherent anti-features which made a lot of people avoid them like fire. For example, the way mobile phones connect to the mobile network, through towers, by design, makes it a surveillance system. And the SIM card companies keep the data of where the phone goes. Notice how for this surveillance, the software on the phone is irrelevant. It could be Free or it could be Non-Free. Surveillance is done in a different way. So requiring a cell phone is a big issue.
Some features may not work when a specific Non-Free program is not installed on the system. It's usually the case with Android apps which depend on either Google Play Services or Google Maps to be installed. But it could be other things, on other systems too. It could be even a simple fact that the program is only available on a Non-Free operating system. If a program in question is Free, but depends on Non-Free software, there might be a fork ( a different version ) where this dependency is removed, or changed to use something Free instead.
A lot of software connects to internet servers in order to work. It means that some of the work of this software is done on the server. And not on the user's computer. Meaning, the user looses some control over the computation. The server could be Free Software as well. Meaning, if users don't like something about the server, they can start another one, fixing all their problems. And connect to it instead. But other servers might be proprietary or secret. In this case, you are on the mercy of the server maintainers.
WebTox is a web-based Tox client written in go (server-side) and html5 (client-side).
Several proprietary parts were removed from the original Telegram client, including Google Play Services for the location services, HockeySDK for self-updates and push notifications through Google Cloud Messaging. Location sharing functionality is restored using OpenStreetMap.
With the rise of government monitoring programs, qTox provides an easy to use application that allows you to connect with friends and family without anyone else listening in. While other big-name services require you to pay for features, qTox is totally free, and comes without advertising.
This app [Telegram] have nothing with privacy, it's remotely controlled. It's pissing me off, so i changed that.
Command-line interface for Telegram. Uses readline interface.
A not for profit, open source matrix client with a focus on privacy and ease of use.
Quaternion is a cross-platform desktop IM client for the [matrix] protocol.
A fancy, customizable, keyboard-operable [matrix] chat client for encrypted and decentralized communication.
A cross-platform centralized encrypted instant messaging service developed by the non-profit Signal Foundation and Signal Messenger LLC.