This site is built entirely with free and open source software. It runs on WordPress, specifically a self-hosted WordPress Multisite installation to allow running multiple sites side by side (like my project site). It uses a lightly customized child theme of Primer that has some custom widgets for optional per-page sidebar content. (I am unreasonably happy with the Hopper colour scheme that marks the different site sections — try it by clicking around in the nav bar.)
The header image is a severely cropped version of Nighthawks, a 1942 oil painting by Edward Hopper. My Dutch site features a less well-known scene of social interaction by Hopper: Chop Suey, made in 1929. Both images are in the public domain.
Publication lists are displayed using ZotPress (by the amazing Katie Seaborn) and a Zotero group library. This means listing papers is literally as easy adding them to Zotero, the free and open source reference manager made by scholars for scholars. (Zotero is also the perfect tool for collecting, organizing and citing academic literature. Check out my Zotero tutorial here.) The papers by figures page is simply a listing of posts that uses featured images along with Zotpress citations.
Overviews of media coverage use data from the open altmetric service ImpactStory. ImpactStory, made by the wonderful people behind Our Research, collected news coverage and social media shares for any ORCID profile in 2010-2020; unfortunately profiles are no longer actively updated. ORCID is a nice and friendly free service that enables name disambiguation and can keep an authorative list of your scholarly output.
For basic visitor statistics I use Matomo, an excellent open source alternative for Google Analytics. IP addresses are anonymized and data never leaves the server. For speed, I use Redis Object Cache and try to minimize the number of plugins I run.