What are the top 10 shipping rate management tools available today, and how do they compare across key features such as real-time multi-carrier rate comparison, automated shipping rules and label generation, integration with e-commerce, ERP, and warehouse management systems, support for international shipping and customs calculations, analytics and reporting for cost optimization, scalability for high-volume and global shipping operations, API and automation capabilities, ease of use and deployment, security and compliance standards, cost-effectiveness, and suitability for small businesses, mid-sized organizations, and large enterprise logistics environments?