ojo stands for oss.jfrog.org - a free Artifactory instance for OSS developers who have packages in bintray.com jcenter repository
Every OSS developer who includes their package in Bintray's JCenter is eligible for a free account on oss.jfrog.org - an Artifactory instance for development needs. This instance also have a unique REST resource for automatic conversion of SNAPSHOT builds and their promotion to Bintray (works for Gradle and Maven builds).
Full documentation is available in JFrog Wiki.