Note: This update costs $15 for Yosemite users. But is free to use on Mavericks.
Note: Yosemite support.
Note: Now uses ARC instead of GC.
Feature: Mixins are now process-separated.
Feature: Git gutter. Shows the changes you make, relative to the last Git commit.
Feature: CSS live preview. Web preview updates CSS as-you-type, even if it's in a separate file. There's no need to save to see changes.
Feature: Corrected wrap guideline. Works better than the old one (which isn't saying much).
Feature: Padding at the bottom of the editor.
Note: Padding and wrap guidelines are configurable through View menu/Margin Preferences.
Feature: Multicursor mode works with text actions such as uppercase, reverse, indent, etc.
Bug: Turned off code completion when in multicursor mode.
Feature: cmd-alt-dot is back after an extended absence (it had to be reimplemented).
Bug: esc-completion matches case properly.
Feature: Added Git Tower to the context menu.
Feature: Errors and Warnings window - see a list of all errors and warnings in your document.
Feature: Double click on an error to Google it.
Feature: Rust and Swift syntax highlighting. Live error checking for Rust.
Note: Changed system requirements, now requires 10.9+