氧氣計劃（英語：Oxygen Project）是KDE 4 一個刷新視覺感受的項目。 最初的目的是建立一套新的图标，但擴大到包括一個新的主題，其中包括一個新的光標，工具和窗口的主題和聲音。 它代表著打破KDE以往卡通風格的介面 ，採取更加逼真如照片般的風格。 Oxygen的名字來自於一個開發者之間的玩笑，他們希望「把呼吸新鮮空氣帶到桌面」（"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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