Tiny ones for the most part. Chain loach and Bettas are the only ones of any size. Pygmy cory, Habrosus cory, Panda cory, Strawberry Boraras and just got some Emerald Dwarf Rasboras.. though that's not their name now, I forget what it is changed to.
Also a lot of shrimp. Painted Fire Red cherries, Yellow cherries, Pinochio, four species of Fan shrimp, Vampire, Dwarf Bamboos and the standard Bamboos, and Green lace. Also Babaultis ( mostly green ones).,
And some Daisy Rice fish and a few Pure strain Endlers. About 16 species of snails, some of which I breed. I just sold my kuhli loaches, a mystery loach, Cherry barbs and Purple Harlequins, as they'd been living with a friend since April, and I was commuting a half hour one way just to see them and do maintenance. My friend fed and topped up, but he's no fish guy and maintenance was too much for him. All thanks to my rat of a landlord who is making my life a living hell. Won't do repairs and until he does, I can't put the big tanks back up and they have been shut down since April last year. Frustrating.