The best replacement for windows 2003 is windows xp.

The best alternatives to windows 2003 are rated as following:

★★★★★	windows xp
★★★★★	2008
★★★	windows 2008
★★	2003 r2
★★	r2
★★	windows 2000
★★	windows 2012
★★	2008 r2
★	windows 2003 r2
★	2000
	windows xp professional
	unix
	nt
	netware
	linux server
	windows 2007
	novell

Your alternative for windows 2003 is not listed? Suggest!

Speaking about windows 2003, one probably shouldn't forget about exchange 2000.

Other search terms related to windows 2003 and their ratings are:

★★★★★	exchange 2000
★★	sql 2000
★	pae

You have in mind a companion for windows 2003 and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of windows 2003 in all years. Click on graph for more.

windows 2003

windows xp

2008