Streets & Trips is mapping software created and distributed by Microsoft. Functionally the latest version is a subset of Microsoft MapPoint targeted at the typical consumer to do a variety of map related tasks in the North American region including the United States, Canada, and Mexico, such as route planning. The software is a useful tool in determining and marking locations easily especially if one is on a trip. The .est file extension is utilized mostly for map files created with the use of the mapping software from Streets & Trips. Aside from map files, the .est file extension is also utilized as a Construction Cost Estimate File type. All files that have something to do or are related with construction costs and estimates mostly made by project organizers are saved using the .est extension. This makes easy project estimate. Other software that has files using the .est extension is the Webalizer.01 Lang File.