The best replacement for httpd is apache2.

The best alternatives to httpd are rated as following:
★★★★★  apache2
★★★★  apachectl
★★★  nginx
★  lighttpd

Your alternative for httpd is not listed? Suggest!
Speaking about httpd, one probably shouldn't forget about tomcat.

Other search terms related to httpd and their ratings are:
★★★★★ tomcat
You have in mind a companion for httpd and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of httpd in all years. Click on graph for more.
httpd
apache2
apachectl