phpMyGPX is a Web application based on PHP, MySQL, and OpenLayers to manage photos and GPX files with a browser, on your local machine or online, to share your tracks and images. GPX is an XML file format containing track points and routes collected by GPS receivers, and is very popular with navigation, geocaching, and OpenStreetMap.
FireBreath is a cross-platform plugin architecture, targeting NPAPI browsers on Windows, Mac OS X, and Linux (Gecko/Firefox, Google Chrome, Apple Safari, Opera) and ActiveX Control hosts, including all versions of Microsoft Internet Explorer. It is designed to make it easier to get started than even doing an NPAPI plugin by hand. A Python-based "fbgen" tool generates a template skeleton and makes it possible to have a functioning browser plugin up and running in 20 minutes.