You can use Lookeen as...

Desktop Search

• Aikin HyperSearch alternative
• Docfetcher alternative
• Everything alternative
• Quick Search alternative
• Listary Pro alternative
• FileSearchy alternative
• Puggle alternative

Enterprise Search Client

• dtSearch alternative
• FileLocator Pro alternative
• Copernic Desktop Search alternative
• X1 Search alternative

Enterprise Search Server

• Coveo alternative
• FAST Search Server 2010 alternative
• Oracle Secure Wnterprise Search alternative
• IBM Watson Explorer alternative
• HP IDOL alternative
• SearchBlox^TM alternative
• Google Search Appliance alternative

Outlook Search

• NEO Pro alternative
• Xobni alternative

Outlook Organizer

• ClearContext alternative