• English user page
• Dutch user page
• Former Boardmember Dutch chapter Wikimedia Nederland 2013-2014, i resigned in november 2013 to avoid conflict of interest with my new work as:
• Wikipedian in special residence with eleven Dutch academic libraries 2013-2015, project page
• Wikipedian in residence at Naturalis Biodiversity Center, May - November 2015, project page. Comments are welcome on w:species:User_talk:Hansmuller
• Guinea-Bissau and Senegal 1973-1974 (Coutinho Collection), project to upload 700+ images for the , Leiden, January - May 2016
• University Library Leiden / KITLV project to upload 3000+ Dutch colonial photographs and artworks, February - May 2016
• project to upload images of Africa donated by researchers at the African Studies Centre, Leiden, September - December 2017

* Continued project to upload thousands of Photos of Africa from the African Studies Centre Leiden, September 2019 - present

• 
  School of liberation movement PAIGC, Guinea-Bissau 1974
• 
  Cuban nurse checking blood pressure in liberated parts of Guinea-Bissau, 1974
• 
  Learning how to shoot, liberation movement PAIGC, Ziguinchor, Senegal 1973
• 
  Twelve postal stamps from Zanzibar, 1892 - 1894