Win flex-bison is a windows port the Flex (the fast lexical analyser) and Bison (GNU parser generator). win_flex based on Flex version 2.5.37 source code and win_bison based on Bison version 2.7 and they depend on system libraries only.
UPDATE1: Bison version 3.0 available in Files section in win_flex_bison-2.5.1.zip package.
UPDATE2: Now "winflexbison" available as package in Chocolatey (http://chocolatey.org/packages/winflexbison)
UPDATE3: You can use VS custom build rules to simplify working with winflexbison in Visual Studio 2010 and upper (https://sourceforge.net/p/winflexbison/wiki/Visual%20Studio%20custom%20build%20rules/).
Awesome man !!! Thanks a lot, I used to compile everytime with command lines, sometimes with strange behavior when opening yacc file with Visual Studio 2010. Now it works like a charm, with automatic compilation when needed. Excellent job, very helpful !!!
Used these to build Apache Thrift on Windows 7, worked like a charm.