开源电子书阅读器Calibre

官方网站
很强大的电子书阅读器，支持Windows，Linux和MacOSX
支持多种电子书格式，同时可以进行电纸书格式转换：

calibre supports the conversion of many input formats to many output formats. It can convert every input format in the following list, to every output format.

Input Formats: AZW, AZW3, AZW4, CBZ, CBR, CBC, CHM, DJVU, DOCX, EPUB, FB2, HTML, HTMLZ, LIT, LRF, MOBI, ODT, PDF, PRC, PDB, PML, RB, RTF, SNB, TCR, TXT, TXTZ

Output Formats: AZW3, EPUB, DOCX, FB2, HTMLZ, OEB, LIT, LRF, MOBI, PDB, PMLZ, RB, PDF, RTF, SNB, TCR, TXT, TXTZ, ZIP

Ubuntu下安装方法：
sudo apt-get install calibre