Cleave, an application that lets users persist OS state as a "context" - saving and loading open applications, their windows, tabs, open files/documents and so on.
Started because of frequent multitasking heavy work with limited resources.
Made it because I wanted to switch between studying, working, reading, looking for an apartment, etc. without manually managing all states or consuming all resources.
Open Beta (macOS) as soon as I finish license verification and delta updates, but I keep getting sidetracked by work and other stuff :P