https://www.androidpolice.com/2018/02/12/google-releases-huge-hdr-image-dataset-researchers/

http://hdrplusdata.org/dataset.html

https://www.makeuseof.com/tag/best-raspberry-pi-projects/

Alexa, Google assistant (GassistPi), Big Balancer (robot),

Scratch + RPi, https://www.makeuseof.com/tag/raspberry-pi-scratch/
H/W (LED) control

https://www.makeuseof.com/tag/7-operating-systems-you-can-run-with-raspberry-pi/

Raspian, Kano,

media center (Kodi)
http://openelec.tv/get-openelec
https://osmc.tv/download/
https://libreelec.tv/downloads/

Game Emulator
RetroPie (game), https://retropie.org.uk/download/
RecalBox, https://www.recalbox.com/diyrecalbox


FreeBSD, https://wiki.freebsd.org/FreeBSD/arm/Raspberry%20Pi

ChromiumOS, https://flintos.io/download/

Android, http://androidpi.wikia.com/wiki/Android_Pi_Wiki

Free service, https://dictation.io

https://cogniti-works.blogspot.kr/2016/05/dalkom-20160515-hwp-oxt.html

https://cogniti-works.blogspot.kr/2016/05/hwp_15.html

https://cogniti-works.blogspot.kr/2016/05/libhwp-commit-rebase.html

https://cogniti-works.blogspot.kr/2016/05/libhwp-20160514.html