Update 'README.md'

README.md

@@ -17,6 +17,7 @@ ___
 - [Wikileaks](https://wikileaks.org/)
 - [Not Even Wrong](https://www.math.columbia.edu/~woit/wordpress/)
 - [Mathstodon](https://mathstodon.xyz/about)
+- [Google Keep](http://lucasstinchcombe.github.io/?url=keep.google.com/u/0/#home)
 
 ## Resources
 - [ZLIB](https://www.reddit.com/r/zlibrary/wiki/index/access/)