What is .XTP file extension?
Project accessed by xPlan, a project management application; similar to the .PJ2 and .PJM file; created by the app4mac xTime Project program, which became xPlan; contains project data input such as the budget, project tasks, days off, and task duration.
NOTE: xPlan can open the XTP file and any other files associated with the xTime Project application.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.