DNS Stuff
http://www.dnsstuff.com/

File2HD.com
http://www.file2hd.com/

Geo Location
http://www.ipligence.com/geolocation/

IANA
http://www.iana.org/

InterNIC
http://www.internic.com/

Livemocha: Learn Languages Online
http://www.livemocha.com/

Media-Convert: conversor on-line de arquivos
http://media-convert.com/conversor/

Mega Proxy
http://www.megaproxy.com/

Next Generation Center - Cursos de TI gratuitos e online com certificação da Intel
http://www.nextgenerationcenter.com/

PHP
http://www.php.net/

PHP Brasil
http://www.phpbrasil.com/

PHP5Brasil
http://www.php5.com.br/

Postmaster
http://www.terra.com.br/postmaster/

Registro.br
http://registro.br/

Zamzar - Free online file conversion
http://www.zamzar.com/