Multiple Sequence Alignment (MSA) is generally the alignment of three or more biological sequences (protein or nucleic acid) of similar length. From the output, homology can be inferred and the evolutionary relationships between the sequences studied.
A collection of MSA software such as with access:Clustal Omega,EMBOSS Cons,Kalign,MAFFT,MUSCLE,MView,T-Coffee,WebPRANK
Short descriptions of all tools listed on page