The middle RAM has the size - 32M. Minute, by today's standards. Those went up to 512M IIRC. All SD RAM, either PC100 or PC133.
The cards are a mixture of ISA, PCI and AGP. ISA has the big copper pads on the edge connector. PCI has the narrow copper pads. AGP has the overlapping rows.
AGP are all video cards. Only works on older mobos now.
The DFE 530-TX is a network adaptor, 100Mbps probably.
The first ISA card could be a sound card, the others could be modems.
The last card with Creative on it - they made a lot of sound cards back in the day, but the connector looks too big. Could be another modem, or it might be a sound card.