Local Config Paths

hosts:

/private/etc/hosts

(for windows, right click > permissions > allow > apply)
C:\Windows\System32\Drivers\etc

(for Virtual Box to see mac dev sites add)
10.0.2.2 yoursite.dev

httpd.conf:

/Applications/MAMP/conf/apache/httpd.conf
/Applications/XAMPP/xamppfiles/etc/httpd.conf

vhosts:

/etc/apache2/extra/httpd-vhosts.conf
/Applications/XAMPP/xamppfiles/etc/extra/httpd-vhosts.conf

php.ini:

/Applications/XAMPP/xamppfiles/etc/php.ini
/private/etc/

CMS Config Paths

WordPress:

/wp-config.php

Joomla:

/configuration.php

Magento:

/app/etc/config.xml

Local App Paths

Sublime Text Packages:

/Users/simonowen/Library/Application Support/Sublime Text 2/Packages
/Users/simonowen/Library/Application Support/Sublime Text 3/Packages

Chrome Dev Tool Themes:

~/Library/Application Support/Google/Chrome/Default/User StyleSheets/Custom.css
~/Library/Application Support/Google/Chrome Canary/Default/User StyleSheets/Custom.css