Ivo Hofacker (all parts) Peter Stadler (design, documentation, cluster algorithms) Walter Fontana (suboptimal folding, pre-historic implementation of mfe folding) Stefan Wuchty (suboptimal folding) Stephan Bernhart (cofolding, local folding) Ulli Mueckstein (RNAup) Ronny Lorenz (redesign for version 2.0, documentation, circfolding, RNA2Dfold, RNAparconv and more)