It would help to see individual -- and larger -- photos. Otherwise it's just guesswork (though admittedly some folks' guesses are a lot better than mine would be).

Lets have a go then. Left to right.
1 Opuntia
2 Cordyline.
3 Echinopsis
4 Aloe
5 Crassula.
6 Haworthia
7 Kalanchoe
8 Euphorbia millii?

I think your answers should have been in 5pt font. Thedecoguy. ;-)

i believe.. there is a very active cactus forum

ken

Thank you so much,
Sorry for small pix.