Awesome Privacy

Capture and interprets network traffic based on a set of rules, and depending on the interactions certain assignments are blocked. Open source, written in Go and delivered as a single executable.

A utility that disables a number of risky Windows features. These "features" are exposed by the OS and primary consumer applications, and very commonly abused by attackers, to execute malicious code on a victim's computer. So this tool just reduces the attack surface by disabling the low-hanging fruit.

A portable app that lets you disable core Windows features (such as Cortana, Edge) and control which data is passed to Microsoft. (Note: Free, but not open source).

Portable app with a GUI, that makes it really easy to safely block key telemetry features, from sending data to Microsoft and other third parties (It uses the Windows API to interact with key features of Local Group Police, Services, Tasks Scheduler, etc).

Anti low-level keylogger: Provides full system-wide key press protection, and target window screenshot protection.

Provides protection against software keyloggers. Encrypts keypresses at driver level, and decrypts at application level, to protect against common keyloggers.

Portable virtual keyboard. Useful for protecting from keyloggers when using a public computer, as it can run of a USB with no administrative permissions.

Useful utility, that attempts to terminate known malware processes, so that your normal security software can then run and clean your computer of infections.

A utility for configuring encryption protocols, cyphers, hashing methods, and key exchanges for Windows components. Useful for sysadmins on Windows Server.

Internet traffic control and monitoring tool.

Scans for accessibility tools backdoors via RDP.

A CLI utility that shows file version number, timestamp information, and digital signature details.

Group Policy objects, compliance checks, and configuration tools that provide an automated and flexible approach for securely deploying and maintaining the latest releases of Windows 10.

Detects infected USB removable devices.

Rootkit detection and removal utility.

Blocks malicious background applications from taking screenshots.

Blocks unauthorized webcam access.

Open source GUI app built upon PowerShell, allowing you to perform a quick and easy privacy check, on Windows 10 systems.

Open source GUI app built upon PowerShell, for disabling telemetry functions in Windows 10, uninstalling preinstalled apps, installing software packages and automating Windows tasks with integrated PowerShell scripting.

Light-weight, portable app for controlling the many privacy-related settings within Windows 10- with the aim of helping to keep private data, private.

Good alternative to CCleaner, for deleting unnecessary data - logs, cache, history, etc.