I don't know if this one has been posted but:
http://www.000webhost.com/
Offers FREE hosting of
1.5GB Data
100GB Bandwidth
2 MySQL Databases (I believe the DB Size limit is conjoined with your 1.5GB Data)
Far less restrictive than most other Free hosting (first I have seen to allow cURL requests)
Free web44.net subdomains (I was able to use No-IP.com using CNAME it just has to be registered as parked with 000webhost)
From php_info()
safe_mode on
disabled_functions
system,
show_source,
exec,
shell_exec,
proc_open,
passthru,
set_time_limit,
ini_restore,
mysql_list_dbs,
ini_alter,
dl,
pfsockopen,
openlog,
syslog,
symlink,
link,
chgrp,
leak,
popen,
escapeshellcmd,
apache_child_terminate,
apache_get_modules,
apache_get_version,
apache_getenv,
apache_note,
apache_setenv,
virtual,
mb_send_mail
php configure:
'--prefix=/usr/local/php5'
'--with-libdir=lib64'
'--sysconfdir=/etc'
'--disable-rpath'
'--enable-cli'
'--disable-cgi'
'--with-config-file-path=/usr/local/lib'
'--disable-all'
'--enable-libxml'
'--with-libxml-dir=/usr'
'--with-openssl=/usr'
'--with-kerberos=/usr'
'--with-pcre-regex=/usr'
'--with-zlib=/usr'
'--with-zlib-dir=/usr'
'--enable-bcmath'
'--enable-magic-quotes'
'--with-bz2=/usr'
'--enable-calendar'
'--enable-ctype'
'--with-curl=/usr'
'--with-curlwrappers'
'--enable-dom'
'--enable-exif'
'--enable-filter'
'--with-pcre-dir=/usr'
'--enable-ftp'
'--with-openssl-dir=/usr'
'--with-gd=/usr'
'--enable-gd-native-ttf'
'--with-jpeg-dir=/usr'
'--with-png-dir=/usr'
'--with-zlib-dir=/usr'
'--with-xpm-dir=/usr'
'--with-ttf=/usr'
'--with-freetype-dir=/usr'
'--with-t1lib=/usr'
'--with-gettext=/usr'
'--with-gmp=/usr'
'--enable-hash'
'--with-iconv'
'--enable-mbregex'
'--enable-mbstring'
'--with-mcrypt=/usr'
'--with-mhash=/usr'
'--with-mime-magic=/usr/share/magic.mime'
'--with-mysql=/usr'
'--with-mysqli=/usr/bin/mysql_config'
'--with-sqlite'
'--enable-pdo'
'--with-pdo-sqlite'
'--with-pdo-mysql=/usr'
'--enable-posix'
'--enable-reflection'
'--enable-session'
'--enable-simplexml'
'--enable-sockets'
'--enable-spl'
'--enable-soap'
'--enable-json'
'--enable-inline-optimization'
'--enable-tokenizer'
'--with-regex=system'
'--enable-xml'
'--with-libexpat-dir=/usr'
'--enable-xmlreader'
'--with-xmlrpc'
'--enable-xmlwriter'
'--with-xsl=/usr'
'--enable-zip'
'--with-imap=/usr/lib64/dovecot/imap'
'--with-imap-ssl'
'--with-pear=/usr/local/lib/php'
'--with-apxs2=/usr/local/apache/bin/apxs'
So if someone is looking for something free to learn on or something and they are not restricted by the PHP settings this would be a good start, they do not advertise on any of your pages but they do have a global footer that might cause some issues
(IE: JSON calls)
<!-- Hosting24 Analytics Code -->
<script type="text/javascript" src="http://stats.hosting24.com/count.php"></script>
<!-- End Of Analytics Code -->
Besides the few quirks you're going to get with any free hosting, this IMO would be the best, I have never had a problem with the hosting and am hosting a media aggregator for a media sharing system that takes media links from select sources and compiles them into a different formatting to obtain the media information.