Merge pull request #8 from Rishabhsahu325/patch-2

Update _introduction.md

Author: brettchalupa

src/general-graphical-apps/_introduction.md

@@ -17,3 +17,4 @@ While you could certainly build web applications for these projects, there's som
 - [Xamarin](https://dotnet.microsoft.com/en-us/apps/xamarin) — cross-platform apps built with .NET and C#
 - [Kotlin](https://developer.android.com/kotlin) — Android development
 - [Qt](https://www.qt.io) — cross-platform app toolkit, seems a bit enterprise-y
+- [Kivy Framework](https://kivy.org/) — a free cross platform app development library in python