Apache2 can be downloaded at http://httpd.apache.org/download.cgi
Note: At present, Evergreen is only compatible with Apache 2.0.x. Apache 2.2.x produces errors (which are being worked on in future versions of Evergreen)
A Vanilla install of Apache2 with SSL enabled should suffice. Below is how we built our test Apache server
./configure --prefix=/opt --enable-rewrite --enable-alias\ --enable-ssl --enable-expires --enable-include --enable-deflate\ --enable-proxy --enable-cache make make install