Apache Taverna is an open source software tool for designing and executing workflows, initially created by the myGrid project under the name Taverna Workbench, now a project under the Apache incubator. Taverna allows users to integrate many different software components, including WSDL SOAP or REST Web services, such as those provided by the National Center for Biotechnology Information, the European Bioinformatics Institute, the DNA Databank of Japan (DDBJ), SoapLab, BioMOBY and EMBOSS.