Modules providing high-level features

• cache, a cache implementation with a least recently used algorithm.
• changelog, a tiny library to manipulate our simplified ChangeLog file format.
• clcommands, high-level classes to define command line programs handling different subcommands. It is based on configuration to get easy command line / configuration file handling.
• configuration, some classes to handle unified configuration from both command line (using optparse) and configuration file (using ConfigParser).
• proc, interface to Linux /proc.
• umessage, unicode email support.
• ureports, micro-reports, a way to create simple reports using python objects without care of the final formatting. ReST and html formatters are provided.

Modules providing low-level functions and structures

• compat, provides a transparent compatibility layer between different python versions.
• date, a set of date manipulation functions.
• daemon, a daemon function and mix-in class to properly start an Unix daemon process.
• decorators, function decorators such as cached, timed...
• deprecation, decorator, metaclass & all to mark functions / classes as deprecated or moved
• fileutils, some file / file path manipulation utilities.
• graph, graph manipulations functions such as cycle detection, bases for dot file generation.
• modutils, python module manipulation functions.
• shellutils, some powerful shell like functions to replace shell scripts with python scripts.
• tasksqueue, a prioritized tasks queue implementation.
• textutils, some text manipulation functions (ansi colorization, line wrapping, rest support...).
• tree, base class to represent tree structure, and some others to make it works with the visitor implementation (see below).
• visitor, a generic visitor pattern implementation.

Modules extending some standard modules

• debugger, pdb customization.
• logging_ext, extensions to logging module such as a colorized formatter and an easier initialization function.
• optik_ext, defines some new option types (regexp, csv, color, date, etc.) for optik / optparse

Modules extending some external modules

• sphinx_ext, Sphinx plugin defining a autodocstring directive.
• vcgutils , utilities functions to generate file readable with Georg Sander's vcg tool (Visualization of Compiler Graphs).

To be deprecated modules

Those logilab.common modules will much probably be deprecated in future versions:

• testlib: use unittest2 instead
• interface: use zope.interface if you really want this
• table, xmlutils: is that used?
• sphinxutils: we won't go that way imo (i == syt)