Geo2tag is an Open Source Location Based Services Platform. It provides all programming interfaces and services (database for geodata, filters, queries) which is needed for deploying location aware and geocontext services. Everyone can download (How to download and install Geo2Tag) and use it absolutely free of charge . We do best to allow geo2tag work very fast and survive under massive request flow.
Please check release page to figure out what we already done and roadmap page to be informed about our future plans. If you have want to join our development process please have a look at API description (API description) and register in project tracker or just drop a line to info (at) geo2tag.org.