...It is specifically designed to handle comic books (both Western comics and manga) and supports a variety of container formats (including CBR, CBZ, CB7, CBT, LHA and PDF). MComix is a fork of Comix.
Free editor for PDF documents. Complete editing of PDF documents is possible with PDFedit. You can change raw pdf objects (for advanced users) or use many gui functions. Functionality can be easily extended using a scripting language (ECMAScript).
Jomic is a viewer for comic books stored in CBZ, CBR, and PDF files. Features include a two page mode, caching and support for several image formats (PNG, JFIF/JPEG, TIFF, and GIF). It is Open Source software distributed under the GNU GPL.