Update README.md

added system.css

Author: Amplifi-Beats

README.md

@@ -4,8 +4,9 @@
 - [PSone.css](https://github.com/micah5/PSone.css): PS1 style CSS Framework, inspired by NES.css.
 - [98.css](https://github.com/jdan/98.css): A Windows 98 inspired framework for building faithful recreations of old UIs.
 - [XP.css](https://github.com/botoxparty/XP.css): A Windows XP inspired framework for building faithful recreations of operating system GUIs. An extension of 98.css.
+- [7.css](https://github.com/khang-nd/7.css): A tiny CSS framework that takes semantic HTML and styles them to the Windows 7 design
 - [BOOTSTRA.386](https://github.com/kristopolous/BOOTSTRA.386): A vintage 1980s DOS inspired Twitter Bootstrap theme
 - [New Dawn](https://github.com/npjg/new-dawn): A mac classic After Dark inspired stylesheet.
-
+- [system.css](https://github.com/sakofchit/system.css): A CSS library for building interfaces that resemble Apple's System OS which ran from 1984-1991. 
 
 Feel free to PR this repo with more repos!