Zettel allows taking notes from several references and organizing them
is a rich dictionary containing multiple computer-related terms
Acts like a real library with the best user interface on the backpack.
A free open source system to create and manage collections of eBooks
Complete tool for constructing/manipulating languages in digital form
Open source library software (books); command line only
Keep all of your quotes in one place and easily find them later.
Detect all the "important" files from your computer.
A very simple standalone library management application.
FOSS Ebook Server, With no windowing requirements