If that's true and you aren't actually violating an NDA or Covenant Not to Compete and your independent development was done neither on compay time nore on compay equipment/software, you could just pretend that they don't exist and ignore them. The problem is, now that they are aware, that they could be dumb enough to try and sue your or place a restraining order on you. If this continues, [font="Arial Black"]you need to stop listening to us "sea-lawyers" and get a real one[/font] to protect you and your property. A real lawyer might be able to end it with a "Cease and Desist" order on your behalf.

{edit: spelling correction}