What are some alternatives?
When comparing FreeHostingNoAds and Rackspace, you can also consider the following products
000webhost - Zero cost website hosting with PHP, MySQL, Cpanel & no ads!
ProFreeHost - ProFreeHost is the provider of free and unlimited web hosting along with additional tools and services in the shape of PHP, FTP, cPanel, MySQL, unlimited disk space, unlimited websites hosting, unlimited domains, unlimited bandwidth and much more.
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
Infinity Free - Infinity Free is a free web hosting company. You can 3 websites for free.
AWS - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.
HelioHost - Community powered free hosting for everyone.