In the case of LIT, ConvertLIT (say) can both strip the DRM (encryption), if any, and explode the ebook to HTML. Note that stripping the DRM probably isn't legal, because in the US there isn't an exception to the DMCA for braille, but it is hard to see who is harmed by format shifting to braille for personal use.
Most Kindle ebooks are in the AZW format, which is functionally identical to the MOBI format. The script mobidedrm will strip the DRM (encryption) from an AZW ebook producing a DRM-free MOBI. Then the script mobi2oeb (part of Calibre) will "explode" a DRM-free MOBI to HTML. The combination of these two scripts is the equivalent to ConvertLIT for LIT.
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