Open Source Software for Windows
Librevault
Librevault allows you to transfer data directly from one device to another, securely. Librevault is a free and open-source peer-to-peer file synchronization software, designed with convenience. privacy and security in mind. The software encrypts all data with AES-256 and uses TLS for all transmissions. Their goal is to make a better alternative to BitTorrent Sync and Syncthing.
Publii
Publii is a free and open-source headless CMS designed for speed and ease-of-use. With Publii, you can build beautiful modern sites that will run fast in browser thanks to Google's AMP technology. What make Publii unique is that the content management is done via a desktop-based client that works for MacOS, Linux and Windows.
CamStudio
CamStudio is a free and open-source screen capturing software for Windows. With CamStudio you can record video from your computer screen and save it with the .avi file extension, which is supported by most video players and video editing software. CamStudio also allow you to add subtitles and screen captions or video annotations to your recordings through anti-aliased images. All recordings made with CamStudio are captured with a lossless codec that produces crystal clear results with a much smaller filesize. CamStudio is used by creators who wan't a free, capable alternative to commercial screen capturing software.
pgweb
Web-based PostgreSQL database browser written in Go. Pgweb is a web-based database browser for PostgreSQL, written in Go and works on OSX, Linux and Windows machines.
Qt
Qt includes everything you need to build cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little to no change in the underlying codebase. Qt is released open-source under the GNU Free Documentation License, and provides a commerical offering for enterprises.
Seafile
Seafile is an open source file sync & share solution designed for high reliability, performance and productivity. Sync, share and collaborate across devices and teams. Seafile can be self-hosted, or provided as a managed and hosted solution. With Seafile, you can rest assured that your files are safe as all files are encrypted before syncing with the server, even system administrators have the capability to view your personal files.
Brackets
Brackets is a modern, open sourc ecode editor that is lightweight, yet powerful. The editor features a blend of visual tools and a clean user interface packed with features like Live Preview, Quic Edit and Preprocessor Support. With Brackets you can design and develop for the using technologies like HTML, CSS and JavaScript.
Python
An object-oriented, high-level, general-purpose programming language with an easy-to-learn syntax. Python was first released in 1991 by Guido van Rossum with a design philosophy that emphasises code readability. Today Python is one of the most widely used programming languages where it is used in everything from data science, machine learning and AI to modern web, mobile and desktop applications.
Sia
Sia is a decentralized storage platform secured by blockchain technology. The Sia Storage Platform leverages underutilized hard drive capacity around the world to create a decentralized data storage marketplace that is more reliable and lower cost than traditional cloud storage providers. With Sia you can store files in the decentralized cloud without signup requirements, servers and trusted third-party providers. On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3.
Adminer
Adminer provides administrators, developers and website maintainers with a full-featured database management tool written in PHP. With Adminer you can to a database servers with username and password. List fields, indexes, foreign keys and triggers of table. Change name, engine, collation, auto_increment and comment of table. Alter name, type, collation, comment and default values of columns. Create, alter and drop indexes, foreign keys, select form view and call stored procedures and functions. The software is distributed under the Apache License which makes it free and open-source. Adminer supports a wide variety of relational and NoSQL databases including MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, Firebird, SimpleDB, Elasticsearch and MongoDB.