This site provides reasonably detailed information on various thin client hardware I have had my hands on so that you can assess whether a particular one can be tailored to meet your own needs.

This is the router lab the DE-CIX Academy uses for their BGP seminar "BGP for networks who peer".
It contains of a few docker images plus one subdirectory for each experiment the students use during the seminar.

MobyCAIRO stands for Computer-Assisted Image ROtation. It is designed to assist a user in the common, tedious tasks of rotating and cropping images.

Test traffic generator for continuous traffic.

A maintained fork of the last public version of the Mozilla Send code (backend for the file sharing system that was included in some versions of Firefox until there was too much of an abuse problem).

EinkBro, a fork of FOSS Browser optimized for usage on E-Ink devices (paginated view instead of scrolling, for example)