hv3(3tcl) on Linux
The text cfe0b2b1f79b, as Debian 8 (Jessie) shipped it.
Mega-widget building on Tkhtml. THIS IS A WORK IN PROGRESS. IT IS POSSIBLE TO USE THE HV3 WIDGET, BUT IT IS NOT YET PROPERLY PACKAGED. POST ON THE MAILING LIST IF YOU WISH TO USE IT NOW. Comments and feedback also welcome.