I sell a few command-line utilities for Windows ( MailSend, MailGrab, CMD2EXE, and ScreenKap ).
How do you promote these?
I don't do much promotion. I used to visit some appropriate Usenet groups ( 10 years ago ) and would announce new versions and such on groups such as alt.msdos.batch.nt. Before the dot-com bubble burst, I used to get a lot of traffic from the good shareware sites out there.