We have twm in the repos
root:# slapt-get --show twm
Package Name: twm
Package Mirror:
http://vectorlinux.osuosl.org/veclinux-6.0/extra/Package Priority: Default
Package Location: ./x
Package Version: 1.0.4-i486-1
Package Size: 76 K
Package Installed Size: 180 K
Package Required: libICE >= 1.0.4-i486-1,libSM >= 1.0.3-i486-1,libX11 >= 1.1.4-i486-1,libXau >= 1.0.3-i486-1,libXdmcp >= 1.0.2-i486-1,libXext >= 1.0.4-i486-1,libXmu >= 1.0.4-i486-1,libXt >= 1.0.5-i486-1,libxcb >= 1.0-i486-2
Package Conflicts:
Package Suggests:
Package MD5 Sum: 43b2f6520672bf81b98aa61286cdc82d
Package Description:
twm
twm is part of X11.
For more information about the X.Org Foundation (the providers of the
X.Org implementation of the X Window System), see their website:
http://www.x.orgPackage Installed: no
you need to enable the "extra" repo