Core X11 protocol client library (aka "Xlib")
Server component
Font configuration and customization library
Incubator for a general Unix Device Memory Allocation library
XQuartz window manager
Common Access Card library
Xlib-based library for common extensions to the X11 protocol
XCB client and window-manager helpers for ICCCM & EWMH.
XCB convenience functions for the Render extension.
Cellular modem control and connectivity
libdbus language binding (wrapper) for CPython
IGT gpu tools and tests
Example KMS/GBM/EGL application
X FreeType library
Templates for applications and plugins