Google Desktop applications alternatives

Ungoogled Chromium

Chromium (which Chrome and countless other browsers are built on top of) is one of the cleanest and light-weight browsers available. This version cuts out all the Google crap.

Firefox

Built by Mozilla, "The Privacy Company". Huge extension library; great for privacy.

Vivaldi

Privacy-focused browser. Appears to be very customizable and feature-rich.

Tor Browser

Firefox-based browser routed through the Tor network. Automatically has a few privacy extensions installed (such as HTTPS Everywhere). Read this article for more info on how it works and the benefits of using Tor. Available for Windows, Linux, macOS, and Android.

Librewolf

Librewolf is a fork of Firefox, with improved privacy defaults. Similarly to Waterfox, Librewolf is based on Firefox and intends to improve privacy by default. Many privacy enthusiasts have recommended it as a more effective privacy browser than other Firefox forks.

Waterfox

Based on Firefox, but 64-bit only with an emphasis on speed and privacy. Has a "classic" version built off older Firefox for legacy extension support and also an "alpha" version built off Quantum. It doesn't collect any telemetry and also removes Pocket from the alpha release. Project is run by Alex Kontos and is constantly in active development. Looks very clean and fast. Android versions are in the works too. UPDATE: @Nudin pointed out in Issue #85 that Waterfox is now a part of System1.

Mullvad Browser

Firefox-based, a collaboration between Mullvad and The Tor Project. Similar to Tor Browser in privacy and security, without the use of the Tor network.

KDE Marble

Strong alternative for G Earth. Currently only on Linux, but is being ported to other platforms. Thanks to @PopeRigby

VSCodium

VSCodium is Visual Studio Code but without all the Microsoft telemetry and branding.

Vim

Open-source text editor. Thanks @moon-chilled

Emacs

Another open-source text editor. Thanks @moon-chilled