Koofr - Koofr offers safe EU based cloud storage with free storage space for life and options to connect multiple cloud accounts (Dropbox, Google Drive, OneDrive) and your personal storages.
Apache Solr - Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and...
MultCloud - Multiple Cloud Storage Manager: Migrate, move, sync, copy, backup and transfer cloud files with MultCloud, which supports Dropbox, Box, Google Drive, Mega, OneDrive and FTP, etc.
Websolr - Exterprise-grade search powered by open-source Apache Solr.
CloudFuze - Managed Cloud Office Migrations with Unparalleled Security & Performance.
Decisiv Search - Decisiv is an enterprise search solution enabling users to search multiple repositories at once to access documents, projects etc.