diff --git a/index/computerScience.md b/index/computerScience.md
index c4e2556..5a53b4f 100644
--- a/index/computerScience.md
+++ b/index/computerScience.md
@@ -64,6 +64,8 @@
 
 - [U++ is a C++ cross-platform rapid application development framework focused on programmers productivity. It includes a set of libraries (GUI, SQL, etc.), and an integrated development environment.欧洲人用得较多](https://www.ultimatepp.org/)
     - [github ultimatepp](https://github.com/ultimatepp)
+- [IUP is a multi-platform toolkit for building graphical user interfaces. It offers a simple API in three basic languages: C, Lua and LED. IUP's purpose is to allow a program source code to be compiled in different systems without any modification.](https://www.tecgraf.puc-rio.br/iup/)
+- [Nuklear is a minimal-state, immediate-mode graphical user interface toolkit written in ANSI C and licensed under public domain. It was designed as a simple embeddable user interface for application and does not have any dependencies, a default render backend or OS window/input handling but instead provides a highly modular, library-based approach, with simple input state for input and draw commands describing primitive shapes as output.](https://github.com/Immediate-Mode-UI/Nuklear)
 
 ### Engine