In case you haven't been following, KiCad is a mature eCAD tool, being used for fairly complex designs all over the world. It has the obvious advantage of being free, but there are other benefits, too, such as the ability to extend it using Python.
KiCon 2019 is the first user-oriented KiCad conference ever. There will be a chance to learn about KiCad itself, but also meet fellow designers and engineers, exchange tips, and learn about new techniques. See you there!
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.