pyPEG is a quick and easy solution for creating a parser in Python programs. pyPEG uses a PEG language in Python data structures to parse, so it can be used dynamically to parse nearly every context free language. The output is a plain Python data structure called pyAST, or, as an alternative, XML.
noaadata-py is a library for handling marine Automatic Identification System (AIS) messages and NOAA marine data messages from http://opendap.co-ops.nos.noaa.gov/axis/. It has extensions to handle the USCG N-AIS receive fields. For AIS ship traffic, noaadata provides bridges to Sqlite3 and PostgreSQL/Postgis databases. It is able to generate Google Earth KML files for AIS. It is part of the UNH/NOAA Chart of the Future project.
BOUML is a UML 2 tool box that allows you to specify and generate code in C++, Java, IDL, and PHP. BOUML is very fast and doesn't require much memory to manage several thousands of classes. BOUML is extensible, and the external tools (named plug-outs) can be written in C++ or Java, using BOUML for their definition as any other program. UML models can be exported to HTML pages, including PNG or SVG graphics.
VFGEN is a program that takes a specification of a vector field (in other words, a system of differential equations) and generates source code for a wide variety of ODE solvers and other numerical tools. It includes a command for generating C code to be used with the CVODE solver.
Dimenso is a library for performing dimension-aware calculations in C# and Java. It offers numeric types that have dimensions, expressed in terms of base dimensions M (mass), L (length), T (time), and Q (electric charge). Playing to the strengths of each language, C# types have operator overloads to allow them to be used as numbers, while Java types mimic the BigDecimal with respect to arithmetic methods.