The Ninf Project provides two versions of Ninf-G, Ninf-G Version 4 (Ninf-G4) and Ninf-G Version 5 (Ninf-G5). Ninf-G4 has been used as a recommended version and still a supported version which is appropriate for users who use Ninf-G4 for Grid environments with the Globus Toolkit. Ninf-G5 is a new version which is works in non-Globus Grid environments. Ninf-G5 is also expected to provide high performance in a single system.