DevConverter converts your ebooks online. Amongst many others, we support EPUB, PDF, AZW and CBZ. No need to download any software to convert between various ebook formats!
TCR is a ZVR based eBook file format that is used in some eBook readers. It is used to store a document. Although it is a proprietary file format from Calibre, TCR files can be viewed from several eBook reading software. It has better compression technique than palmDOC.