Here are some of the more important events in the history of the taginfo project. The numerous small improvements and bugfixes can't all be listed.
- Project started
- Added translation support, first languages English, German, Italian
- Add support for embedding taginfo snippets into OSM wiki
- Add the first reports
- Started API documentation
- Added JSONP support
- taginfo.openstreetmap.ie is the first site other than the main site to use taginfo.
- Switched from taginfo.openstreetmap.de to taginfo.openstreetmap.org
- Add French and Russian translation
- Add maps for keys on ways
- Add config file
- New design for web user interace
- Add support for Ruby 1.9
- Add Polish translation
- Add CORS support
- Switch to API version 4
- Fully switch to Ruby 1.9, doesn't work with Ruby 1.8 any more
- Switch to jQuery 1.9
- Switch from Protovis to D3 for graphs and charts
- Add word cloud to homepage
- Add support for relation types
- Add support for keyboard shortcuts
- Add support for key/tag/relation type thumbnails from wiki
- Start collecting some statistics in a database thats kept from day to day
- Add link to Overpass Turbo
- Main taginfo site moves to OSMF infrastructure
- Add Portuguese translation
- Added Ukrainian translation
- Add support for key/tag comparison
- Add Level0 editor link
- Add support for maps on popular tags
- Remove support for old API versions 2 and 3
- Add Hungarian, Spanish, and Vietnamese translation
- Add support for external projects
- Add Brazilian Portuguese translation
- Add 'Similarity' tab for keys
- Add 'Historic development' report