AZE-VTX

The Videotext Editor VTX is a Teletext editor for MS-DOS. It is distributed by Andreas Ziemer Elektronik on their [website]

There is a newer version called "TTX-Editor v1.02" which is a Windows MDI application. It currently sells for 79.90 Euros, or 99.90 Euros for the "extended Version" which allows talking to their teletext inserters.