zip08x is a library that provides convenient read access to files inside a zip archive. Users and developers can archive application-specific files to a zip archive using well known utilities (zip) and read them from the application when needed. This helps reduce scattering of files on the filesystem.
zlcatalog is a C library that can be used to organize information in a non-hierarchical way. It features an XML file structure, elements that can belong to multiple groups, groups that can be sorted by name or date, and an API that provides easy methods of bulding groups from directories, adding/removing groups, adding/removing elements, etc.
zlib is designed to be a free, general-purpose, legally unencumbered, lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms. Unlike the LZW compression method used in Unix compress(1), the compression method currently used in zlib essentially never expands the data. (LZW can double or triple the file size in extreme cases.) zlib's memory footprint is also independent of the input data and can be reduced, if necessary, at some cost in compression.
Zoem is a general-purpose macro/programming language that submits text to a two-stage transformation process. Macro expansion and interpretation is followed by application of customizable character filtering rules. Zoem supports inside-out evaluation, comprehensive IO, control operators, iteration, dictionary stacks, multidimensional data storage, arithmetic expressions, regular expressions, system commands, and more.
zzuf is a transparent application input fuzzer. Its purpose is to find bugs in applications by corrupting their user-contributed data, which frequently comes from untrusted sources on the Internet. It works by intercepting file and network operations and changing random bits in the program's input. zzuf's behavior is deterministic, making it easier to reproduce bugs.