1- The Pocketbook readers run LINUX and offer an SDK to allow the independent development of applications for their readers.
2- In addition to mobile Adobe Digital Editions (the reader app for DRM-encrusted ePub) the Pocketbook readers come with a version of the open source FBReader ported to the Pocketbook platform.
3- FBReader180 is an *alternate* reader app for Pocketbook readers that allows paging using the motion sensor. It also exposes, via of a series interactive settings panes, dozens of formatting overrides that go beyond the (hardly limited) features of the baseline Pocketbook reader apps.
4- The main reason to prefer FBReader180 is the granularity and specificity of the extended options which let you set rendering options on a per-tag basis to single-point precision.
Baseline features:
https://www.mobileread.com/forums/showthread.php?t=61908
FBReader180:
http://code.google.com/p/fbreader-po...eader180_guide