The goal of ProtonDB is to gather reports from other gamers as they test games with Proton on Linux and provide aggregate scores of how well games perform. A growing pool of suggestions provides tweaks that you can try to get games working while Proton continues development. In addition to this, you may explore the Steam game catalog on this site to browse and discover a wide range of titles that were previously unavailable for use on Linux.
An electronics parts database.
Electronics components DataBase (ecDB) has been acquired by PartsBox.
PartsBox is an online app that lets you take control of your electronic parts inventory, BOM pricing, and small-scale production. It keeps track of where components are stored, what the current stock levels are, and which components are used in which projects/BOMs.
PartsBox significantly expands what ecDB offered, with lots of new features and a blazingly fast parts search. It is available commercially (with features like BOM pricing, barcode scanning, sub-assemblies, file uploads and lots more), but there is also a free hobbyist/maker version, with everything the hobbyist needs.