Plasma Workspace

basic functionality

New Plasma netbook shell
Storage devices can now automatically be mounted

Widgets can be published on the network and be accessed remotely

Networkmanager frontend (knetworkmanager)
- Experimental network-manager plasma widget
Applets can now be associated to an application (e.g. picture frame -> gwenview, etc.)
Desktop theme configuration has been moved to System Settings -> Style
Workspace actions moved to System Settings -> Desktop
Initial desktop configuration is now scriptable
Taskbar animations
New widgets explorer
Mouse action plugins

Improved layout for the battery widget's popup
OpenGL accelerated popup animation
Support for Plasma widgets in the system tray
System tray items can now be automatically shown or hidden
Workflow and layout improvements in the device manager widget
Improved KMix OSD

Taskbar previews are not clickable
Setting the wallpaper using drag&drop
Support for dropping remote content

Window & Compositing Manager

New: Window maximizing and tiling by snapping to the screen-edges ("Aero Snap")
Native window tabs: Arbitrary windows can be grouped in tabs
Window Management Plugin for KRunner
Subtle animations in the window decoration, and other options to customize the window behavior
Alt+Tab window switching improvements
Improvements in present windows, flip switch, logout effect

Other widgets and addons

Bookmark runner now also supports Firefox' bookmarks
NEW Blackboard: a simple paint canvas, it's possible to paint with the mouse or with multitouch events on platforms that supports them
NEW KDE Observatory: keep track of the development of your favorite KDE projects
NEW KIMPanel: KDE Input Method Panel for multibyte input
NEW Knowledge Base: query the knowledgebase of opendesktop.org
NEW On-screen keyboard
NEW OpenDesktop.org Activities: activity infomration from opendesktop.org
NEW Qalculate math expression evaluator, based on libqalculate
NEW Spellcheck: a quick spell checking area
NEW Webslice: a plasmoid displaying a part of a web page
NEW Window list
Battery: Improved layout, better support for bigger fonts
Device notifier
- Visual revamp to make it look and feel more Plasma
- Supports non-removable volumes
- Can show/hide devices from the interface
- Popup autohides after 10s of innactivity
Picture Frame: now supports loading and displaying of remote images
Microblog: can view replies and direct messages
Quicklaunch: ascending and descending sort for applications in quicklaunch applet.
SystemTray
- now can embed other plasmoids
- supports the finalized version of the StatusNotifier specification
- old notifications remains accessible for a while, separed by application name, browseable with a tabbar widget
Tasks
- clicking on a window preview now activates that window
- mouse over on a window preview highlights the window if the highlight windows KWin effect is activated
- control+click on a window group launches the KWin present windows effect if activated
- new taskbar animations
NEW Pastebin dataengine
- Weather widget now supports wetter.com

NEW audioplayercontrol: control any MPRIS enabled audio application (amarok is the default)
NEW plasma-desktop: "desktop console [script file]" triggers the interactive scripting window
NEW solid: devices and hotplug support using Solid
NEW mediawiki: generic mediawiki searching with .desktop files for wikipedia, techbase, wikitravel and userbase by default
NEW windows: switch between and control windows and desktops
Service runner: a query on a freedesktop application category, like "network" will show all applications of that category
Bookmarks runner: the query "bookmarks" (or its translation) lists all the bookmarks
Contacts runner: the query "contacts" shows all contacts
Image wallpaper combobox has been replaced with a nicer view.
Image wallpaper offers 'Next Wallpaper Image' contextual action in slide-show mode.
DataEngines can now also be written in JavaScript

KDE Development Platform

KAuth: Authorization framework, harnesses PolicyKit, used in
- Font installer
- System Activity
Multitouch resize, rotate and move on platforms that support multi-touch
New high-level animation API, based on Qt Kinetic
Nepomuk:
- New Virtuoso backend, much faster, more scalable
- Nepomuk: KIO slave for querying Nepomuk resources
- Nepomuk is now able to search on non-mounted media
libksane (scanner library): basic scanner support for Windows
improved exiv2 support in libkexiv2
Add Odd/Even page selection and server-side page selection when using CUPS
KDE integration of QtWebKit (cookies, proxies, etc. but not KPart)
Thumbnail previews for Comicbook format
Add new calendar systems: Indian Civil (Saka), Pure Julian, Pure Gregorian.

KDE Applications

Basic

Dolphin: integrated searching

PIM / Groupware

New: KAddressbook rewrite for Akonadi
KMail:
- Archiving of emails
- Improved recipient picker
- searching by tag
- Clickable HTML statusbar
- Collapsible recipient fields
- Error messages are now passive, less disturbant to workflow
- Templating improvements

Educational & Games

KStars: Observation plan manager
KAlgebra
- support for lists
- better MathML presentation support, lambda expressions, jump detections
- new 2d parametric function plotting
New Edu app: Cantor
New Edu app: Rocs
New game: Granatier
New game: Palapeli

Network

Kopete: Create avatars from a webcam
KRDC:
- Telepathy Tubes support,
- full screen switching
KGet:
- better support for verification of downloaded files
- Broken downloads can be repaired
- Support for adding mirrors, moving and renaming files while downloading
- Assistant to create metalinks

Utilities

Okteta Hex Editor:
- Improved selecting mechanism
- Base64 encoding
- Split views
- Storing of bookmarks

non-SC Applications

Digikam (stable KDE4 release in December)
Amarok