Single Site Analysis (SSA)
Detect over-represented conserved transcription factor binding sites in a set of genes or sequences.
Anchored Combination Site Analysis (aCSA)
Detect over-represented combinations of conserved transcription factor binding sites in a set of genes or sequences.
TFBS Cluster Analysis (TCA)
Detect over-represented conserved transcription factor binding site clusters in a set of sequences.
Anchored Combination TFBS Cluster Analysis (aCTCA)
Detect over-represented combinatons of conserved transcription factor binding site clusters in a set of sequences.

The CAGEd-oPOSSUM tool (motif enrichment analysis from CAGE-derived TSSs) is available here.

The previous release of oPOSSUM (version 2.0) is available here.