Liferay Portal, Oracle Primavera, Open Atrium, KnowledgeTree, OpenCms, gini.net, Noodle Intranet Software, MyHub, SABIO, GreenOrbit, Livetiles, IntelliEnterprise, CogniDox, Papyrs, Silverpeas, Engynn Intranet Software, Folio Cloud, MailShogun are some alternatives to Shelf.io.