
Willem L. Middelkoop MSc BICT
IT business owner, investor, hacker and software developer






Lemmid Store
With Lemmid Store business owners can easily sell products online via their own website, independently from big (powerful) platforms.

DigiDef
DigiDef is a specialised bureau that analyses existing computer systems and offers help with improving security.

Lemmid B.V.
Lemmid provides internet services for selected Dutch and international customers. Together with the customer Lemmid develops new IT products and services, including websites, web applications and apps.

dsd 164 B.V.
dsd 164 B.V. is a publisher of mobile apps for the international market. Apps from dsd 164 B.V. are downloaded millions of times.

Willem & Laurentz Holding B.V.
The Willem & Laurentz Holding B.V. invests in technology related companies. It is actively contributing to the development of new initiatives.

Snake '97
Play Snake like it is 1997. This is a remake of the original Snake, complete with dot-matrix display and monotone sounds. The game has millions of fans world wide.
The Ultimate Freedom Bike
Riding the Brompton foldable bike

Rarely have I been so amazed by a bike: the past 5 months since I've picked up my Brompton foldable bike in Amsterdam have been great fun! About 500KM down the road, I'm happy to share some of my experiences with this ingenious piece of engineering, read on!
Computer says no
How today is ruled by Artificial Intelligence

This morning I enjoyed my bike ride on a nearly empty bicycle lane, picture perfect rays of sunlight illuminated the dew above the fields around me. Where were all the other cyclists? I suspect it has something to do with popular weather apps. It strikes me how great the control of computers on people's lives already is.
CAPTCHA Alternative
Protect your forms in a user friendly way

Chances are that you've encountered a CAPTCHA in the wild: they protect web forms by asking you to type over weirdly rendered characters or by asking you to select photos containing a particular thing. Why are they used and is there a user friendly alternative?