synapter is free and open-source software. If you use it, please support the project by citing it in publications:
Nicholas James Bond, Pavel Vyacheslavovich Shliaha, Kathryn S. Lilley, and Laurent Gatto. Improving qualitative and quantitative performance for MS$^E$-based label free proteomics. J. Proteome Res., 2013, 12 (6), pp 2340–2353
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