Try out Igor Pro 6 !

Download the fully-functional IGOR Pro 6 Demo and try it for 30 days after installation. After 30 days, the demo will lapse into limited functionality mode. The limitations of this mode are:
• Saving is disabled.
• The clipboard contents cannot be transferred to other programs.
• The printing output is lightly over-printed with Igor-related words.

SYSTEM REQUIREMENTS
Igor Pro 6 runs under Windows 2000, Windows XP, and Windows Vista.
Igor Pro 6 does not run on Windows NT, Windows 95, Windows 98 or Windows ME.