--- a/avr.rst	Mon Sep 27 11:14:24 2010 +0300
+++ b/avr.rst	Tue Sep 28 23:53:20 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.

--- a/lpt.rst	Mon Sep 27 11:14:24 2010 +0300
+++ b/lpt.rst	Tue Sep 28 23:53:20 2010 +0300
@@ -23,6 +23,9 @@
 
 
   http://www.prolific.com.tw/eng/products.asp?id=6
+                about page
+  http://www.prolific.com.tw/eng/downloads.asp?ID=36
+                driver download page
 
 * USB to LPT driver.
 

--- a/rs232.rst	Mon Sep 27 11:14:24 2010 +0300
+++ b/rs232.rst	Tue Sep 28 23:53:20 2010 +0300
@@ -4,4 +4,8 @@
 
 ** PL-2303.
 
+  http://www.prolific.com.tw/eng/downloads.asp?ID=23
+                datasheet download page
   http://www.prolific.com.tw/eng/downloads.asp?id=31
+                driver download page
+