LEMON Library of Efficient Models and Optimization in Networks LEMON is the abbreviation of Library of Efficient Models and Optimization in Networks. It is an open source library written in C++. It provides a set of easy-to-use implementation of common data structures and algorithms in the area of optimization and helps implementing new ones. It is an especially suitable tool to solve the design and optimization problems of telecommunications networks. To achieve wide usability, a fundamental design requirement is the genericity of interface of data structures and algorithms. Lemon is intended to become an open source library in order to involve people all around the world in its development. The subdirectories 'autopackage', 'build-aux' and 'm4' are needed by installation. In subdirectory 'benchmark' programs can be found that observe the performance of LEMON. Subdirectory 'demo' contains some demonstration programs to make you easier to getting familiar with LEMON. Documentation of LEMON can be found in subdirectory 'doc'. Source code of LEMON is in subdirectory 'lemon'. Some useful scripts related to the usage of LEMON can be found in subdirectory 'scripts'. In subdirectory 'test' you can find some programs, proofing you the correctness of some implementations. See file COPYING for copying, distribution and modification conditions and terms. For general building and installation instructions, see the file INSTALL. Version number of the package is the highest one written in file NEWS.