The META PredictProtein server

Volker Eyrich (Columbia Univ, Chemistry Dept.) has written a general interface that enables users to simultaneously submit a sequence to a wide variety of prediction services (submission page).
You submit your sequence once (paste into WWW form), and you get results from currently more than 10 different programs via email.
The following services are available at the moment:

Miscellaneous services
1. SignalP prediction of presence and location of signal peptide cleavage sites in amino acid sequences from different organisms
2. NetOglyc prediction of mucin type GalNAc O-glycosylation sites in mammalian proteins.
3. NetPicoRNA predictions of cleavage sites of picornaviral proteases.
4. ChloroP predictions of whether or not a protein contains an N-terminal chloroplast transit peptide, cTP, and of probable sites for cleavage of the transit peptide.
Secondary structure prediction
1. JPRED consensus method for protein secondary structure prediction.
Transmembrane helices
1. TMHMM prediction the location of transmembrane helices and their topology.
2. TOPPRED prediction of location and orientation of transmembrane helices.
3. DAS prediction of location of transmembrane helices.
Threading (remote homology search)
1. FRSVR prediction-based threading, also incorporating purely sequence-based database searches.
2. SAMT98 hidden Markov model method (SAM-T98) for finding remote homologs of protein sequences.
Homology modelling
1. SWISS-MODEL prediction of 3D structure by homology modelling (automated server).
2. CPHmodels prediction of 3D structure by homology modelling through a collection of methods and databases developed to predict protein structures.