KML Workbench

Circle Generator
Generate KML LineString, Polygon and MultiGeometry Circles Destination Calculator
Calculate the destination from a given starting point, distance and bearing Distance Calculator
Calculate the distance between the two points DMS
Convert degrees, minutes, seconds Final Bearing
Calculate the Final Bearing (reverse azimuth) between two points. Initial Bearing
Calculate the Initial Bearing (forward azimuth) between two points Intersection
Find the intersection of two paths Midpoint
Calculate the midpoint between two coordinates Nearest Point
Find the nearest point of given points Console
A php console environment to test PAK classes and methods Reverse
Reverse the order of coordinates within KML elements RF Leg
Generate a Radius-to-Fix Leg Segment LineString
Divide a LineString into a number of segments All Tools
All KML Workbench Tools, including applications, calculators, generators, parsers and converters

Earth Survey
Land Surveying Research Tools JAK
javaapiforkml (JAK) on GitHub JAK API Docs
JAK class documentation SIMPLEKML
Python KML package Movable Type Scripts
Calculate distance, bearing and more between Latitude/Longitude points Free Geography Tools
Exploring the world of free tools for GIS, GPS, Google Earth, neogeography, and more. NYPL Map Warper
New York Public Library Map Warper BatchGeo
Generate Google Earth KML Documents EarthPoint
Tools for Google Earth FreeMapTools
Maps you can make use of... KML Toolbox
A collection of online tools to create, process, and import/export KML code. Google Earth Blog
Google Earth blog Google Earth Library
Google Earth library