It is a Java-based open source ERP aimed at the small and midsize business sectors. Despite being a more recent project than most other software mentioned here, it has already received some good press and is one of the best open sources. When self-hosted are used by one user in the cloud, Metasfresh is free. It is available as a cloud-hosted solution for 1-100 users for a monthly membership cost.
IOS, Android, Windows Mobile, Black Berry
Desktop OS Support
Web App, Windows, Macintosh
Multi Language Support
Is it cloud based?