this was mentioned before, but i thought i would highlight this suggestion:
wxWidgets (C++)
you can use wxWidgets to use the same codebase for the Mac and Windows version at least. the great thing about wxWidgets is that it uses the native GUI for each platform, so it looks at home on both Mac and Windows.
plus it is free, and includes some sample code for text-editor-like applications, which should jumpstart your development time.
a Palm version is likely to require a lot of platform specific coding, no matter which platform you choose for Mac/Win.
wxWidgets (C++)
you can use wxWidgets to use the same codebase for the Mac and Windows version at least. the great thing about wxWidgets is that it uses the native GUI for each platform, so it looks at home on both Mac and Windows.
plus it is free, and includes some sample code for text-editor-like applications, which should jumpstart your development time.
a Palm version is likely to require a lot of platform specific coding, no matter which platform you choose for Mac/Win.