Marianne Wartoft's freeware

I have tried out some freeware for English, developed by Marianne Wartoft. I think the software for phonetics, Sephonics, can be a good help for all students and teachers of English, but particularly for those who are learning English in some remote parts of the world where they have a very limited contact with native speakers. I have experienced in Vietnam that some teachers of English, though full of energy and good-will, had difficulties expressing themselves. I suppose that the Vietnamese language lacks a number of sounds that are used in the English language. If they're not regularly in contact with native speakers, the production of these sounds becomes problematic. Maybe this program can help a little...
Intonation is very important in the Vietnamese language: one evening we were invited in Saigon by Mr Tach for dinner, and the subject of Vietnamese language popped up. They were pronouncing three words, identical to me, but quite different to them because of the intonation, an aspect that I failed to perceive... very interesting!!
Marianne Wartoft has also Selingua to exercise vocabulary and verbs, but the exercises and games are presented mostly in another language (Swedish, German, French, Spanish, but - unfortunately - not Dutch (nor Vietnamese...).
For our Geography colleagues Seterra seems to have been a success for years....
Great to see that some people share their works without the need of financial profit! Thanks to Marianne for that!