Windows, Linux, Mac OS
C++, STL
Qt
WinAPI, MFC, GDI/GDI+, COM, ATL, ActiveX, WinRT
.NET, C#, Windows.Forms, WPF, WCF
.NET Core
XML, XSLT
Python
ASP.NET, ASP.NET MVC, HTML, JavaScript, AJAX, jQuery
ADO.NET, LINQ, Entity Framework
MS SQL Server, MS Access, SQLite, MySQL, SQL Anywhere