Cross-platform development

Independent software vendors (ISV) for desktop software who want to reach not just the Windows market but also the Macintosh and Linux markets have a choice of methods for cross-platform development and deployment.

Here are a few links about these techniques:

Books

Write Portable Code, by Brian Hook (July 2005)
Cross-Platform Game Programming, by Steven Goodwin (March 2005)

Web Pages

Wikipedia: Cross-platform
Wikipedia: Widget Toolkit
WyoGuide (mostly wxWindows specific, but tries also to give general guidelines)
Platform Independent Software Develoment, by Michael Tschater (LinuxFocus, October 2004)
Writing Cross-Platform Software - Getting Started by Michael D. Crawford, GoingWare Inc. (2002)
Freebyte's Guide to Cross-Platform Programming
The GUI Toolkit, Framework Page (a list of alternatives that would stun an ox; last updated Feb 2005)

Archived Discussions

http://discuss.fogcreek.com/joelonsoftware/default.asp?cmd=show&ixPost=180149
http://discuss.joelonsoftware.com/default.asp?joel.3.35415.16
http://ask.slashdot.org/article.pl?sid=00/06/02/025232&mode=thread
Cinetpaint migrated from GTK to FLTK - for the wrong reasons, it sounds like. Novices beware: major GUI toolkits are single-threaded for good reason.

Papers / Presentations

Cross-Platform Approaches from a Macintosh Perspective, by Jonathan Hoyle (ADHOC 2005)