Dungeons and Dragons for kids

http://www.susanjmorris.com/dd-for-kids/

Monster Slayers: The Heroes of Hesiod
http://www.wizards.com/dnd/files/MS_HeroesHesiod.pdf

Monster Slayers: The Champions of the Elements
http://media.wizards.com/2015/downloads/dnd/MonsterSlayers_v3.pdf

The Haunted Castle
http://highvariance.net/blog/2013/11/21/non-violent-dungeons-and-dragons-for-kids/

miniponics

https://www.mediamatic.net/nl/page/46742/miniponics

Raspberry Pi - Quantified aquarium link

http://readwrite.com/2014/03/04/raspberry-pi-quantified-fish-acquarium/

chess openings

https://www.dwheeler.com/chess-openings/

georoadbook (a link i keep forgetting)

http://georoadbook.vaguelibre.net/

Transcribe! by SeventhString - amazing karaoke mode / filtering modes for audio

https://www.seventhstring.com/xscribe/overview.html

creating Drum tabs and midi files - DrumBurp and LilyPond

Creating drum tabs, midi files and a note transcript
https://en.wikipedia.org/wiki/Drum_tablature

DrumBurp
http://whatang.org/

With LilyPond, to export it to a nice Staff transcript
http://lilypond.org/