This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
Yes; you can use a VGA-Box (or "V-Box"). It accepts 4 composite video inputs (NTSC or PAL) and 1 VGA input. The output is VGA. Briefly VGA-Box converts your Apple II video (from the RCA plug) to a 15- pin VGA/SVGA output you can plug it into a modern PC monitor. VGA Box is priced under $50. For a pic and ordering info, see http://store.yahoo.com/baysoftgames/vgabox1.html . I was using an old monochrome monitor. Finally I can play all my games in color once again! By: John J and Tim