Download GPS Toolkit 2.5 from our website for free. The program is included in Development Tools. The most popular versions among GPS Toolkit users are 2.4, 2.3 and 1.7. The actual developer of the free software is Applied Research Laboratories, The University of Texas at Austin.
From the developer:
GPS Toolkit is a program that provides an open source library and suite of applications to the satellite navigation community. It brings a wide array of functions that solve processing problems associated with GNSS such as processing or using standard formats such as RINEX.
You may want to check out more software, such as GPS ToolKit Lite, Eye4Software GPS Toolkit or GPS Master, which might be similar to GPS Toolkit.