TimeLiner can read Microsoft Project.mpx files directly, without needing a copy of Microsoft Project (or any other scheduling software) installed. Primavera SureTrakPrimavera Project Planner and Asta Power Project can all export .mpx files.
Primavera SureTrak exports its unique id in the text10 field of the .mpx file, rather than the unique id field. When linking to an .mpx file exported from SureTrak be sure to specify the text10 field as the unique id field in the Field Selector Dialog