– Our daughter Sarah’s page:  https://www.sarahneutkens.com/

– Our YouTube channel. Here you can find some videos of concerts I play as well as films of me at home practising solo pieces for concerts, as well as a couple of Sarah’s concerts: http://www.youtube.com/user/neutkensh

– My wife Rachel’s website. She designs and makes great furniture: http://www.racheltimmermans.wordpress.com

– Mindat.org, the web’s most comprehensive mineralogy/geology database. I’m in the management board of Mindat: http://www.mindat.org/

– Strahlen.org, Dutch based mineralogy site boasting a fantastic interactive map showing mineralogy related places of interest: http://www.strahlen.org/

– Mineralienatlas, German mineralogy and geology site offering a very good mineralogy/geology Lexicon: http://www.mineralienatlas.de/

– Jan van den Berg, theatre maker. Jan makes theatre productions about science, especially physics: http://janvandenberg.org/

– Baroque orchestra Collegium ad Mosam: http://www.admosam.eu/

– Baroque orchestra Accademia Amsterdam: http://www.amstelimpresariaat.nl/nl/gemengd/accademia-amsterdam

– Baroque orchestra Cappella Maria Barbara: http://www.henkvanzonneveld.nl/site.php?PID=barbara

– Baroque orchestra Musica Poetica: http://www.musicapoetica.info

– Antoinette Lohmann, violin, and Furor Musicus: http://www.antoinettelohmann.nl/

– Baroque orchestra Eik en Linde Amsterdam: http://www.eiklinde.nl/

– Bonporti ensemble: http://www.violisten.nl/bonporti1.html

– Theatre company Ad Hoc: http://www.theateradhoc.nl/

– Theatre company De Utrechtse spelen: http://www.deutrechtsespelen.nl/home

– Theatre company Pra muziektheater: http://pramuziektheater.nl/

– Baroque orchestra Florilegium: http://www.florilegiummusicum.nl/

– The Promenade orchestra: http://www.hetpromenadeorkest.nl/

– David van Ooijen, lute and guitar player: http://www.davidvanooijen.nl/

– Hans de Wit, artist: http://www.hansdewit.net/basis.html

– Bullit klassiek, the best classical CD shop: http://www.bullitklassiek.nl/design/5594/home.html

– TrackTo, Fantastic professional computer animations by Dirk van Poppel: http://www.trackto.nl/nl

– Fields, sculptural acoustic innovations by Marjan Veltkamp: http://www.fields.co.nl/

– CombineZ, Allan Hadley’s brilliant (free!) stacking software: http://www.hadleyweb.pwp.blueyonder.co.uk/

– Business Printing Point, the printing wizards who print all my digital drawings:  http://www.businessprintingpoint.nl/

– The Mineralogical Record, the renowned mineralogical magazine from the USA: http://mineralogicalrecord.com

– Mineralienwelt, German mineralogical magazine: http://www.mineralien-welt.de/

– Lapis, German mineralogical magazine: http://www.lapis.de/