Notepad++

Notepad++ is a text editor and source code editor for Windows.

Notepad++ is distributed as free software.
Notepad++ supports syntax highlighting for 52 programming, scripting, and markup languages.
The program also supports autocompletion for some languages such as HTML.

One free option for Mac users is BBEdit, but directions cannot be provided for non-Windows users.

Double click the installer.
Select preferred language.
Hit next and then accept the license agreement.
Choose where you want it installed. The default path is in Program Files\Notepad++ (or Program Files (x86)\Notepad++ for 64 bit users).
Next you Choose Components. You can optionally check the "As default html viewer" or a localization if you want them, but leave everything else checked and click Next.
Next you'll see a few more options. Most likely you won't have to bother with the top two. Check the option for a desktop icon if you want to.
Then install. Wait for it.... Congratulations! You have installed Notepad++. Leave the checkmark next to "Run Notepad++" and then click the Finish button.

The first time you run Notepad++, it will show a changelog as well as what plugins were installed by default.
Set Notepad++ to expect HTML code.
- Open the Preferences dialog box by clicking on Settings then Preferences. In the resulting window click on the New Document/Default Directory tab and change the Default Language to HTML and then click Close.
  - Don't forget this step, or it will not be able to autoclose tags for you!
- And when we start creating CSS files you will have to click the Language tab, then mouse over C, then click CSS.
- This is for convenience only, and at any point you can click the Language tab and change the language so that Notepad++ accommodates each file type's unique style settings.