Binary descriptions:

libxcb-ewmh-dev: utility libraries for X C Binding -- ewmh, development files
libxcb-ewmh2: utility libraries for X C Binding -- ewmh
libxcb-icccm4: utility libraries for X C Binding -- icccm
libxcb-icccm4-dev: utility libraries for X C Binding -- icccm, development files

Last common version:

0.4.1-1ubuntu1