The program can be installed alone from http://www.apache.org/dyn/closer.cgi.
Apart from that, a portable all-in-one is XAMPP.
Remark (on a PC):
By default Apache is set to automatically launch at startup which is convenient on a server. However on a PC, it may be better to create a script to start and stop it manually. Example with EasyPHP:
net start ews-dbserver net start ews-httpserver net start ews-dashboard pause net stop ews-dashboard net stop ews-httpserver net stop ews-dbserver
apt-get install apache2
The service should be restarted manually after the most part of the configuration modifications:
vim /etc/httpd/conf/httpd.conf #or vim /etc/apache2/apache2.conf /etc/init.d/apache2 restart