I have already asked some people about one of these games, but nobody was able to provide a clue... Maybe here I'll find somebody who knows them.
I used to have both of these games on an old computer in the early 90s, so they are more or less from that period. If I remember well, both had EGA graphics - simple, but pretty nice, not those big blotchy outlines of some early, low-resolution EGA games.

1. A mahjong game I can't find when looking here or on Abandonia - of course, searches can be impeded by the fact that "mah( )jong(g)" can have different spellings, but here there is a whole list of mahjong games (btw, I was almost shocked to find how many porn manga mahjong games there are. Not that I condemn it outright, I just don't enjoy it) and I can't find this one.
Features:
- different layouts with a different melody for each one.
- different tile sets, for example traditional Chinese (THE typical mahjong set), traditional Japanese, sport, country flags, animals...
- animation: all tile pairs disappeared with a sound effect and often a bit of animation: for example in the Japanese set there were four faces that smiled when paired, the "big green dot" in the most typical set turned into a swirl before disappearing...
- when you finished that game, something at the bottom cracked open (what was it? I don't remember. Looked a bit like a peanut, if I remember well) and a sentence sprung out. Actually I was disappointed that it was no "Wisdom of the East", rather in the style of Murphy laws. The one I remember: "Prayers are always answered. The answer is usually no.".
2. An educational game about Europe, from the time when the European Union consisted of 12 countries. You chose a country, played a minigame (like racing through narrow streets to bring money to a bank or playing that gambling machine where you have to line up three identical symbols - what was its name?) and then answered a quiz about that country - some questions were trivial, some quite tough. You received a "souvenir" based on how many questions you answered well - plaster, silver, gold etc. Actually the souvenir was not shown, only the information: "Congratulations! You win a ... souvenir!". And here comes a very silly thing: I was disappointed to the point of laughing at the authors when I completed the whole game and all I received - I would have expected some bigger virtual reward - was: "The prize is: two platinum souvenirs!!" - oh great, I had plenty of those... It was soooo silly, yet I enjoyed the game.

Thanks for advice if someone recognizes those games and knows where to find them!

I know that Moraff made a line of Mahjongg games, though EGA sounds too small-beans for them 8)

The Mahjong game sounds like it may be Shanghai II Dragon's Eye

Oh thanks, that's it! So that's why I coudln't find it: it's a mahjong game without "mah(_)jong(g)" in the title"...

That's because it's not a mahjong game. It's a solitaire / puzzle game played with mahjong tiles. Real mahjong is a competitive game - and we have two different groups for the two types.

Speaking of which, Turn it and Turn it II are Shisen-Sho games:

http://en.wikipedia.org/wiki/Shisen-sho

http://www.mobygames.com/game/turn-it

http://www.mobygames.com/game/dos/turn-it-ii

Game #2 is very likely to be EuroTour II, or perhaps some previous version of the game.

http://www.eurotour.de/en/game/game.html