Telize is a REST API built on Nginx and Lua which gets a visitor's IP address and queries location information from any IP address. It outputs JSON-encoded IP geolocation data, and supports both JSON and JSONP.
RRDA (RRDA REST DNS API) is a REST API that allows you to perform DNS queries over HTTP. It supports PTR records for both IPv4 and IPv6 addresses and outputs JSON-encoded DNS responses.
A package of user-space audit utilities.
A powerful markup template system for Python.