Blower. Dual and triple-fan cards exhaust most of their heat into the case, while blower cards exhaust almost exclusively out of the I/O bracket.
eSATA is a standard used for connecting external hard drives. It uses the same signalling as internal SATA, but with a different connector. mSATA is a form factor for SSDs. Like eSATA, it uses SATA signalling. It uses the connector originally used by full-length mini PCIe cards. Mini PCIe is PCI Express run through a different connector. The half-length version(photo) is almost exclusively used for laptop WiFi cards. Full-length Mini PCIe slots in many devices can also function as mSATA.