SeaView is a graphical multiple sequence alignment editor developped by Manolo Gouy.

SeaView can be used as a standalone application or as a helper application when using the World Wide Web. In this case, prospective users must configure their WWW browser in a way to make it able to recognize the MIME-type associated to the data read by SeaView: chemical/mase.

References:
Galtier, N., Gouy, M. and Gautier, C. (1996) SeaView and Phylo_win, two graphic tools for sequence alignment and molecular phylogeny. Comput. Applic. Biosci., 12, 543-548.[Entrez]