Update README.md

Author: myd7349

README.md

@@ -25,6 +25,7 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 	- [Multimedia](#multimedia)
 	- [Networking](#networking)
 	- [Physics](#physics)
+	- [Scientific Computing](#scientific-computing)
 	- [Scripting](#scripting)
 	- [Serialization](#serialization)
 	- [Video](#video)
@@ -295,6 +296,10 @@ A curated list of awesome C/C++ frameworks, libraries, resources, and shiny thin
 * [ofxBox2d](https://github.com/vanderlin/ofxBox2d) - openFrameworks wrapper for Box2D. [BSD-like]
 * [Simbody](https://github.com/simbody/simbody) - High-performance C++ multibody dynamics/physics library for simulating articulated biomechanical and mechanical systems like vehicles, robots, and the human skeleton. [Apache2]
 
+## Scientific Computing
+* [FFTW](http://www.fftw.org/) - A C library for computing the DFT in one or more dimensions. [GPL]
+* [GSL](http://www.gnu.org/software/gsl/) - GNU scientific library. [GPL]
+
 ## Scripting
 
 * [ChaiScript](https://github.com/ChaiScript/ChaiScript/) - An easy to use embedded scripting language for C++. [BSD] [website](http://chaiscript.com/)