Similar Programs to Metaboanalyst for Proteomics

Hi, does anyone know of any free software similar to Metaboanalyst for Proteomics? I have MS data the serum of some patients which have already been labelled with the names of the proteins, and I wish to do pathway analysis. Could a kind soul point me towards any software that can help accomplish the task? Thanks in advance!

Have you tried our ExpressAnalyst (expressanalyst.ca)? It is designed for both transcriptomics and proteomics. You can read our recent protocols (Current Protocol and Nature Protocol - with proteomics as examples) from the web site