This is a list of proprietary components essential to some functionality of the HTC Dream device.  Descriptions are our best guess -- please let us know if yours is better.

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Components essential to basic phone functionality:
 * libhtc_ril (the GSM radio interface library)
 * libhtc_acoustic.so (the basic audio library)
 * libaudioeq.so (presumably a library related to audio levels)

Components necessary to make non-phone hardware work:
 * libgps.so (the GPS library)
 * lights.goldfish.so (screen & keyboard backlights and other LEDs)
 * sensors.trout.so (accelerometer & compass)
 * system/bin/akmd (sensor daemon?) (also stores settings in /data/misc/akmd_set.txt)
 * brf6300.bin (bluetooth firmware)
 * libqcamera.so (camera)

Media encoding & decoding:
 * libOmxCore.so
 * libOmxVidEnc.so 
 * libOmxH264Dec.so 
 * libOmxMpeg4Dec.so
 * libmm-adspsvc.so
 * libopencorehw.so

Other:
 * libhgl.so (rendering)
 * libjni_pinyinime.so (Pinyin character entry)
 * libspeech.so (Speech recognition)
 * libpvasf.so (Streaming Pocket Video Windows Media Decoder Library)
 * libpvasfreg.so (ASF parser for libpvasf)