Open Source C# System Software for Windows

Cosmos is an operating system "construction kit" made for Visual Studio 2022. Build your own OS using managed languages such as C#, VB.NET, and more! Cosmos (C# Open Source Managed Operating System) is an operating system development kit that uses Visual Studio as its development environment. Despite C# in the name any .NET-based language can be used including VB.NET, Fortran, Delphi Prism, IronPython, F# and more. Cosmos itself and the kernel routines are primarily written in C#, and thus the Cosmos name. Cosmos is not an operating system in the traditional sense, but instead, it is an "Operating System Development Kit". Cosmos lets you create operating systems just as Visual Studio and C# normally let you create applications. Most users can write and boot their own operating system in just a few minutes, all using Visual Studio.

ActiveLock is an open-source copy protection, software licensing framework for all development enviroments supporting COM+ architecture. Core DLL available in VB2008 and VB6. Samples in C++, C#, Excel/Access VBA and keygens in PHP, ASP.NET available.

ConspectIS is a datacenter hardware (servers, switches, appliances, peripherals, virtual), software, and infrastructure (subnets, cabinets/racks, rooms, multiple datacenters) inventory and tracking web application. Written in C# / ASP.Net for IIS web-servers it currently supports MSAccess (MS-JET), MSSQL, with work ongoing for Oracle and ODBC backend databases.

Voxampp is an Enterprise IP TriplePlay Application Stack (eIPTAS) a - run-time toolkit - for Internet Entrepreneurs that want to deploy rich IP Carrier Networks. Its goal, to facilitate worldwide Open Access Social Networks using IPTV, VoIP and much more

The Wandering Developer Deploy Tools are a set of tools to help dotnet developers automate deployment. This is a useful toolkit if you wish to implement autoupdating in your application.