氧气计划（英语：Oxygen Project）是KDE 4 一个刷新视觉感受的项目。 最初的目的是建立一套新的图标，但扩大到包括一个新的主题，其中包括一个新的光标，工具和窗口的主题和声音。 它代表著打破KDE以往卡通风格的介面 ，采取更加逼真如照片般的风格。 Oxygen的名字来自于一个开发者之间的玩笑，他们希望“把呼吸新鲜空气带到桌面”（"bring a breath of fresh air to the desktop"） 。
KDE alpha release, showing oxygen icons with KDE 3.5.x widgets and window decoration.
Oxygen progress as of Beta 1, showing the run dialogue, clock plasmoid and some updated icons in the Dolphin file manager.
Beta 4 with Oxygen widgets and window decoration. A number of Plasma applets can be seen in the background.
RC2 with Oxygen panel.
4.2 Release, featuring improved contrast and more polish from the widget style, and a number of new icons.
KDE 4.2 Release, with an improved taskbar and polish.
KDE 4.2 Release, with customization.
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