https://tweakers.net Dutch-language tech community. Has news, a well-moderated and active forum, product and price comparison (with many filtering options) and reviews (both by tech journalists and the community), second-hand sales, and a job board. It was started by one guy 20 (if not more) years ago, but these days it's part of one of the big Dutch-language media conglomerates (DPG Media).
Nice! Any other Dutch websites you can recommend?
The community on /r/thenetherlands on Reddit is pretty friendly (more friendly than Reddit at large, where arguments tend to devolve into snide remarks with a higher frequency).
https://fok.nl and its associated forums are still kicking, although I don't personally frequent the site.
There is also https://dumpert.nl, which appeals to a certain subset of the population. I admit some of the videos on there can be entertaining, but the community is offputting to me.
Other than that, there are of course a dozen news media (ownership of which is mostly split between two conglomerates: DPG Media and Mediahuis) which have an online presence. Reputable ones include NOS, de Volkskrant, NRC, Trouw, het Parool, de Groene Amsterdammer, FD, de Correspondent. Don't bother with de Telegraaf, it's the Dutch equivalent of The Sun or Bild (or in certain regards, Fox News). There are also media outlets covering Dutch-speaking areas outside the Netherlands (Flanders (Belgium), Suriname), but I'm not too familiar with those, being from the Netherlands myself.
Also of interest might be https://dutchnews.nl and https://facebook.com/NOSinEnglish, Dutch news coverage in English (the latter one specifically translating NOS's COVID-19 coverage).