While predatory conferences have become a way of earning money, there are fortunately also valuable workshops and conferences, which do not charge any registration fee. This is especially being possible with the advent of online events. One example is the “Nanoengineered Superconductors - NES21 Young Investigator's online workshop”, which is sponsored by a COST action. However, free-of-charge conferences are not always easy to discover. Are there any websites listing such events? If not, should we try to create and maintain one?