I had a need for a corkboard. Weird request, I know. I was thinking of getting a large board to hang in my office. I wanted to place cards on it to help organize the structure of my dissertation. The only problem with an analog approach is I can't review it when I'm not home. So I loved for some applications that could solve the problem. After test driving a few sites I settled on Padlet. It meets my requirements of a corkboard and it also has a mobile application that works well. I've started filling in the board with cards and I think it will work well.