This repository contains a set of tools that use OpenStreetMap data.
The lib/ directory contains two PHP files. One for writing OSM files (osm-writer.php) and one file (convert.php) containing classes for converting from the UK National Grid to latitude/longitude as well as routines to convert between OSGB36 and WGS84.
The mkgmap-styles/ directory contains styles to use with mkgmap. There is my normal style (mkgmap-styles/derick) and one that is used together with the osm-analysis-to-garmin tool (mkgmap-styles/osmanalysis).