If you find one, are you going to believe it? I think you should test it experimentally. Run it on size exclusion or native page. Takes like 2 hours, and you'll get the truth straight from nature's mouth!
Not entirely sure what you are looking for but in the following review you can find lists of potentially interesting programs/software: Article Evolution of In Silico Strategies for Protein-Protein Intera...
If you really mean prediction of peptide dimer formation then I am not sure whether such a program exists, since for example in the search for potential AMP’s dimers are promoted by inclusion of cysteines or some kind of linker. Amphipathic peptides can form dimers but often form aggregated/multicomplex structures.
Perhaps PepSite 2 might be of interest: PepSite: prediction of peptide-binding sites from protein surfaces. Trabuco LG, Lise S, Petsalaki E, and Russell RB. Nucleic Acids Res. 2012; 40(Web Server issue): W423-426. http://pepsite2.russelllab.org