Well, the obvious answer is Jezzball...
Nope. Similar divide and conquer gameplay, but the ball leaves a line (snake style) behind it whenever it moves in the un-filled areas, instead of generating the lines to either side when you activate it.
I'll take 'Qix clone #87' for $100!
Sorry, gotta be more specific :)
Um, some sort of Linux Qix clone? Reminds me of old QBasic games...
Nope, played it on DOS. No Basic required (though it may have been written in it, I doubt it).
And people, remember, this is a BONUS question for a free GOG.
Someone still needs to post a new one since Arteveld is giving up his turn!