Twin directories of Xwindows:

[DIR]  ftp://ftp1.fkkt.uni-lj.si/Xwindows/
[DIR]  ftp://ftp.zenez.com/pub/SCO/Skunk96/UnixWare/FreeBird/hints/Xwindows/
[DIR]  ftp://ftp.id-net.fr/pub/linux/Xwindows/
[DIR]  ftp://ftp.esper.net/esper/clients/unix/Xwindows/
[DIR]  ftp://ftp.dal.net/dalnet/old-clients/Xwindows/