Letter: X
- xcpc - A portable Amstrad CPC464/CPC664/CPC6128 Emulator written in C
- xmms2-nonfree - Nonfree plugins for XMMS2
- xorg-x11-drv-fglrx - AMD's proprietary driver for ATI graphic cards
- xorg-x11-drv-nvidia - NVIDIA's proprietary display driver for NVIDIA graphic cards
- xorg-x11-drv-nvidia-96xx - NVIDIA's 96xx series proprietary display driver for NVIDIA graphic cards
- xorg-x11-drv-nvidia-beta - NVIDIA's proprietary display driver for NVIDIA graphic cards
- xorg-x11-drv-nvidia-newest - NVIDIA's proprietary display driver for NVIDIA graphic cards
- xrick - A clone of the game Rick Dangerous
- xv - Interactive image display program for X