Open Source Software for Windows
HedgeDoc
HedgeDoc, formerly known as CodiMD is an open-source collaborative markdown editor. HedgeDoc provides collaborative features that makes it easy for teams to work together by creating notes, graphs and even presentations in real-time. With HedgeDoc, all you need to get started is to share a link to your co-workers, and they can join you in the process.
Prometheus
Prometheus is a Cloud Native Computing Foundation project for systems and service monitoring. With Prometheus you can collect metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed. Prometheus include features like multi-dimensional data models. PromQL, a powerful and flexible query language to leverage this dimensionality. No dependency on distributed storage. An HTTP pull model for time series collection and much more.
Gitter
Gitter is an open-source instant messaging and chat room system for developers designed to make community messaging, collaboration and discovery as smooth and simple as possible. Gitter is provided as software-as-a-service and integrates with GitLab and GitHub repositories to make discussion around code even easier. With Gitter, you can can easily create, organise and grow your communities, inviting others to join just in one click. Over 1.5M users across 100K communities use Gitter to discuss code and development progress.
I2P
The Invisible Internet Project or I2P for short is a fully encrypted private network layer that has been developed with privacy and security by design in order to provide protection for your activity, location and your identity. I2P ships with a router that connects you to the network and applications for sharing, communicating and building a fully encrypted private network layer.
OpenVPN
OpenVPN is a free and open-source VPN client developed by OpenVPN Inc. The software can be used to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. OpenVPN uses custom security protocol that utilizes SSL/TLS for key exchange and is compatible with any OpenVPN protocol compatible server.
Mailspring
Mailspring is a desktop email client designed for macOS, Linux and Windows. It provides modern features like unified inbox, snoozing, templates, offline search, and support for Gmail labels. With Mailspring you can breath fresh air into your mailbox with support for various third-party IMAP provides such as Gmail, Office 365 and Microsoft Outlook. Mailspring intuitive features like read receipts, link tracking, send later, reminders, contact profiles and more.
Vim
Vim dates back all the way to 1991 when Vim's author, Bram Moolenaar released it to the public. Vim is a highly configurable text editor built to enable efficient text editing. The software is released as free and open-source software under the Vim License. Vim is often called a "programmer's editor," as it relies more on customization of shortcuts and makes heavy use of macros that can be combined with muscle memory to achieve maximum proficiency. Vim was designed for use in both command-line interfaces and as a standalone application in a graphical user interface.
Torch
Torch is a Chromium-based web browser developed by Torch Media Inc. Torch comes packed with built-in media downloading, torrent support and sharing features, not found in other browsers. Torch Media Grabber lets you download media files directly from the browser. Torch Torrents lets you interface with magnetic links and download files with the peer-to-peer protocol BitTorrent.
OpenConnect
OpenConnect is an open-source SSL VPN client for Linux and Windows. OpenConnect is based upon SSL security protocol and was built as a replacement VPN client for Cisco’s AnyConnect SSL VPN. With support from the open source community it has now become the standard underlying technology for many VPN providers. With OpenConnect you can implement your own server, initiate data encryption, and import and manage server configurations.
Atom
A free and open-source IDE for macOS, Linux, and Windows developed by GitHub Inc. The application is build on the Electron framework and provides a wide eco-system of add-ons that can be used to extend the IDE further. Atom is loved by developers across the globe.