Kworks is an online tool which will group the segments of 6cM and larger as well as make the in common with grid from your family tree DNA chromosome browser file and ICW file. You can also have segments from other testing companies in the chromosome browser file but best to include a source column then (F for family tree DNA, A for ancestry, 23 for 23andme )
The input files must be in CSV format. The expected column headings for the chromosome browser file are the same ones as at family tree DNA:
Profile Name,Match Name,Chromosome, Start, End, cM,
Other columns will be ignored except for the Source column which is optonal
For full directions and troubleshooting help.
For more information on combining results.