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					Originally Posted by  Redcard
					 
				 
				That's donationware.  In the history of software, it doesn't work. 
			
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 Here now, says who? 
My husband is a bedroom programmer who writes donation-ware. (He wrote the Amazon Reviewer Analysis Tool - ARAT - for those of us who are Amazon reviewing enthusiasts.) He's not made thousands because it's a niche product, but he's made a tidy bit of change. 
Calibre is donation supported. So is Sigil, iirc. So is PRS+, I think. So is Calibre2opds. (Reminder to self: Send new donations now that it's 2012).