huh? Yes, Linux is the answer to all woes, even more so for people that have never used Linux.
There are 64bit "native" PHP builds at windows.php.net
There are 64bit Apache's at both ApacheHaus.com & ApacheLounge.com
There are 64 bit Tomcat builds at tomcat.apache.org
There are 64 bit MySQL builds at mysql.com
There are 64 bit FileZilla Server builds at filezilla-project.org
MercuryMail is lagging, I'll admit that and Webalizer for Windows seems to be no longer available.
There's just no 64 bit Xampp.