New and Updated for PyCharm Professional

EditorConfig

Supports storing code formatting settings inside EditorConfig files, as well as editing EditorConfig files.

W3C Validators

Adds ability to validate CSS and HTML pages with well-known W3C validation services.

Time Tracking

Enables time tracking for "Task Management" plugin.

Task Management

Enables task and context management.

Sass

Supports SASS, a CSS extension language.

Settings Repository

Supports sharing settings between installations of IntelliJ Platform based products used by the same developer (or team) on different computers.

XPathView + XSLT

Provides a possibility to evaluate XPath expressions against any XML document opened in IDEA.

Properties

Enables smart editing of .properties files.

Less

Supports LESS dialect of CSS that extends it with dynamic behavior such as variables, mixins, operators and functions.