I think it may be a columnea aguta. Here is a link... What do you guys think? I have had it for 3 years, 1 year in water and 2 yrs potted. It has never had any flowers tho... Here is a link that might be useful: columnea

#3 is Crassula ovata 'Gollum' 'Skinny Fingers' is a variety of 'Gollum' and thier is one more variety called 'Coral' that came from Europe a giant form the the above mentioned' Gollum' You have several 'Jade' plants in the pictures. One is very white and may not live. You also have a plant that looks like "Jade" but I believe could be Senecio 'Jacobsonii' which is a trailing plant. Don't let it fool you. The one with the red flowers, it 'Red Apple' can't recall the "Latin name" oh, yes 'Apetina". I am so glad to see that you are interested in names, many people are not and tease me because I am. Jo Jo I am pretty sure that you are right about #5 Crassula platyphylla This one of the reasons we need to know the names, if you have a problem with one of these just tell me that name, and see If we can be of help. JoJo you are great with the names, your certainly not a beginner. Norma

Post a close up of the Cotyledon orbiculata (I believe) - the leaves look really nice! Edit: I caught a better look in the photo of your ferocactus. I have a very small cutting only and can't wait for it to get bigger.

If I may suggest - regardless of exact ID, they would do better in different potting media. Looks like they are in original peat? Succulents need good drainage - that means pot with drainage hole(s) and fast draining mix. And lots of sun (after being acclimatized to it).