PilFind (v1.0) predicts bacterial (both Gram-positive and Gram-negative) type IV pilin-like signal peptides and their prepilin peptidase cleavage sites.
References
S. Imam*, Z. Chen*, D.S. Roos, M. Pohlschröder. 2011. Identification of Surprisingly Diverse Type IV Pili, across a Broad Range of Gram-Positive Bacteria. PLoS One. 2011;6(12):e28919