What program to use to create a simple font?

Question

Fonts

What program to use to create a simple font?
In general, there is such a goal: to make the font self-written to simplify life.
Before that, I created it in some program, but I lost both the font and the program.
If you have experience in this vein, then advise a program (which does not require much deepening into the process) for this act