Brackets (available at http://brackets.io/) is a free editor backed by Adobe and has a lot of interesting features such as Inline code editing (where all the CSS selectors that apply to an ID are shown in an inline window by pressing Command / Ctrl + E), Live preview (where if you make any changes to your HTML or CSS, you can instantly see those changes on screen), and so on. It too has a lot of useful extensions such as Brackets-Git (available at https://github.com/zaggino/brackets-git) which provides Git integration from Brackets, Beautify (available at https://github.com/drewhamlett/brackets-beautify) which formats HTML, CSS and JavaScript code, and many others for previewing Markdown, code folding, and so on. The extensions which help in Angular-related coding are shown in the following screenshot:

Note that the last one is already installed in my brackets, so the button is disabled; for other extensions, the Install button is enabled.