A great source of e-book conversion utilities can be found at http://wiki.mobileread.com/wiki/E-book_conversion. There you will find various commercial, opensource and freeware programs that can handle file formats like LRF, CHM, LIT, HTML, PDF, RTF, PDB and DOC and convert them to formats that the Kindle can handle.

I’ve used the opensource Calibre EBook Management Software and can recommend it without hesitation. It’s available for Windows, Linux & the Apple  OS X platforms.

Amazon Kindle File Formats

• AZW
• TXT
• MOBI
• PRC

Note that Amazon offers its conversion via email service for the following file formats;

• Word DOC
• HTML
• JPEG
• TXT
• GIF
• PNG
• BMP
• PDF (experimental, results vary)

Software like earlier mentioned Calibre can handle additional formats, such as;

• CBZ
• CBR
• CBC
• CHM
• EPUB
• FB2
• LIT
• LRF
• ODT
• PDB
• PML
• RB
• RTF
• SNB
• TCR

The file formats for the Palm Desktop files below can be found here .

• datebook.dat and datebook.dba
• memopad.dat and memopad.mpa
• address.dat and address.aba
• todo.dat and todo.tda
• users.dat

These formats apply to the Windows version of the PalmOS Desktop software, not to the native versions of these files.

Programming information on how to go about reading the Palm Desktop files can be found here. There are several user submitted code examples in various languages, such as Perl, Java, Python and Visual Basic.