information Popular software to track your domain buying, selling and listings?

Have you seen DomainMod?

DomainMOD is an open source application used to manage your domains and other internet assets in a central location

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Main Features of DomainMOD

• Central Management
• Registrar Importing
• Bulk Domain Updater
• Custom Data Fields
• Reporting
• Segment Filters
• User-Based Currencies
• Task Scheduler
• Data Warehouse
• Mobile-Friendly
• Browser-Based
• Self-Hosted

Full disclosure: I was developing my own system and then ran across this open source project. I'm now planning to add my special features to this system asap.