My absolute favorite for hand-drawn-esque elements is Excalidraw (https://excalidraw.com/ https://excalidraw.com/). Immediately became enamored by the UX and th

My absolute favorite for hand-drawn-esque elements is Excalidraw (https://excalidraw.com/ https://excalidraw.com/). Immediately became enamored by the UX and the ability to get done what I was looking for - architecture diagrams and low fidelity mock ups. It stores everything locally on your browser, which makes it easy to work offline as well.