Alignment solver is now part of SurveyTools. You can find tha latest version at https://sourceforge.net/projects/surveytools/
Alignment solver is a utility to solve alignment of Road, Rail or Tunnel. It can handle horizontal and vertical offset alignment , offset in transitions. cant, Import form LANDxml and other formats , exports to Landxml, GSI , Trimble ascii , Inroads ascii etc.
The project is under Heavy development. Please report any issues to the ticket system.
Tested...