I don't think 3 is callisia, I think it would look different with more light and it's hard to say what it may be but the leaf edges look like sempervivum or aeonium #4 I think is an offset with a really long stem. Don't expose it to too much light, either cut it shorter or let it lie on its side and develop roots closer to where the leaves are In my climate, some succulents do root very quickly, others can take forever and need lots of misting to get them going. I use my bathroom to root cuttings because it actually isn't that humid there but indoors is a little more humid, has bright, filtered light and is cooler than outside

1 does look like diffractens.

1 and 10 -lithops. 2 and 3 , euphorbia hybrids(globosa,obesa erc) 5-gastera bicolor 6 echeveria setosa 7 and 11 -haworthia renwardtii(now haworthopsis) 9 echeveria setosa var. deminuta 8-also an echeveria, no idea which

1st one looks like a crested Aeonium variegata. Don't know if that's sun damage, but I'd pick off the dried up, dead leaves. 2nd one is some kind of Aloe Haworthia hybrid; pls take that mossy stuff off the top. It can lead to rot &/or help hide insects. Yes, 3rd one is some kind of Echeveria; don't know which one. Pls try not to handle the leaves as it rubs off the whitish stuff which the plant needs. Pls be sure ALL the pots have drainage holes, that's a must. Interesting looking soils, except the 3rd pic. The dark soil btwn the pumice looks very fine & water retentive.