I would like to cut down on the number of ereader applications that I use on my Kobo, because I'm already up to Kobo, Amazon Kindle, Adobe Reader, OverDrive, and DjVu. Something tells me that I'm stuck with the Amazon Kindle software (I purchased a number of books from them a couple of years ago) and DjVu (I've only seen it used on Archive.org), but surely there is something that can handle ePub and PDF with Adobe's DRM?

Any suggestions?