eeemac.kext is a kernel module that provides sysctl states to monitor some functions specific to EeePC hardware, particularly fan speed and CPU temperature. Fan speed can also be adjusted manually (gradually from "off" to jet speed), but this is a highly experimental and risky feature, potentially causing data loss or even physical damage.
Erlangux is a mini distribution system framework in Erlang. It is derived from DSL. It provides an older Linux 2.4.31 kernel, a user-friendly shell, and a good assortment of utilities. It includes the Firefox Web browser, text editors, and the X Window System. It also includes a small footprint GUI, and is able to run most Erlang software.