Update readme.md

Added easing website on tools

readme.md

@@ -57,12 +57,12 @@ List of platforms where projects can be dropped
 - [Steve's Makerspace](https://www.youtube.com/c/StevesMakerspace) - Beginner and intermediate tutorials introducing fundamental algorithms for creative coding. 
 - [PRNG distributions](https://piterpasma.nl/articles/probability) - Interesting basic PRNG distributions.
 - [SDFs by Inigo Quilez](https://iquilezles.org/) - All you need to know about SDFs and other shader magic.
-- [The Book of Shaders](https://thebookofshaders.com/) - Interactive (yet incomplete) book about fragment shaders by Patricio Gonzalez Vivo and Jen Lowe.  
 
 ## Tools
 
 - [Desmos](https://www.desmos.com/calculator) - Online graphing calculator.
 - [Graphtoy](https://graphtoy.com/) - Great way to easily play with lineal formulas.
+- [Easing Functions](https://easings.net/#) - Easy way to get easing math functions.
 
 ## Community