Atom is a next-generation editor from the creators of GitHub. It’s beautiful, fast, extensible and completely free. Atom is a text editor that’s modern, approachable, yet hackable to the core.
With focused visual tools and preprocessor support, Brackets is a modern text editor that makes it easy to design in the browser. It’s crafted from the ground up for web designers and front-end developers.
Local Development and Virtual Machines
Local by Flywheel is local WordPress development made simple. Local by Flywheel makes creating a local WordPress server a breeze, so you don’t have to bother with setting it up yourself! Stop debugging local environments and spend more time launching WordPress sites.
puPHPet is a simple GUI to set up Vagrant virtual machines for web development. Everything is controlled via a simple-to-read YAML file, and comes packaged in a small ZIP archive.
Trellis is WordPress development and production servers done right. Automatically create and provision a server to host a WordPress site. Vagrant in development and any Ubuntu server in production. Trellis takes care of the server for you so you can focus on development.
Streamline your workflow using DesktopServer. Create a new WordPress install in seconds. Automate with custom blueprints, import an existing site, or deploy to a live server in minutes.
XAMPP is a completely free, easy to install Apache distribution for local development containing MySQL and PHP. The XAMPP package has been set up to be incredibly easy to install and to use.
Generate WP is the easiest and the fastest way to create custom and high quality code for your WordPress project using the latest WordPress coding standards and API’s. This is a great tool for setting up custom wp-config.php files, WordPress theme options, custom post-types and more.
WP Quick Install is a PHP script that will install and configure a WordPress installation in seconds! You can configure themes, plugins and content pre-population.
whatsmydns.net allows you to perform a DNS lookup to check a host’s current IP Address (and other useful DNS information). This is especially useful to check the current state of DNS propagation after making changes to your domain’s zones.
Interconnect/it have created this superb WordPress Serialized PHP Search Replace Tool — if you ever need to do a global search and replace across your WordPress database — this is the tool to use. Not for the faint of heart — care must be taken and always back up first.