--- a/avr.rst	Tue Sep 21 00:21:33 2010 +0300
+++ b/avr.rst	Tue Sep 21 00:21:44 2010 +0300
@@ -20,6 +20,15 @@
 
 * tool-chain.
 
+** WinAVR.
+
+WinAVR (pronounced "whenever") is a suite of executable, open source software development tools
+for the Atmel AVR series of RISC microprocessors hosted on the Windows platform. It includes the GNU
+GCC compiler for C and C++. 
+
+ http://winavr.sourceforge.net/
+                home page
+
 ** GNU.
 
 *** avr-libc.