i have never crome across it myself..but its some kind of development software/tool..
how its on your phone only you can ansewer that..!! Can you not remember copying/downloading any zip files to your sd..?? Have you updated software or even phone firmware/rom (unlikely due that)..
Does not the date/time file details ring any bells..
wait for further posts az someone will know the correct answer..
(deleting those files will do no harm to your phone <samsung galaxy s> okay to delete as long as you know they not related any software you installed..