Online+sequence+assembly

online tool to combine overlapping dna sequences

here they mention cap3 and another tool http://www.biostars.org/post/show/11766/how-to-merge-overlapping-two-or-more-dna-sequence/

This site links to several sequence assembly tools http://abhayjere.com/bioinfotools.aspx

Merger http://mobyle.pasteur.fr/cgi-bin/portal.py?#forms::merger

this site has links to assembly software http://www.geneinfinity.org/sp/sp_sequencing.html#assembly