Choosing the right ERP (Enterprise Resource Planning) system for a business in Hong Kong, or any other region, is based on a variety of factors including but not limited to company size, the relevant industry, individual preferences, budget, and existing IT systems. However, there are still several popular and widely used ERP systems in Hong Kong due to their features as well as their adaptability to changing environments. Some of the frequently considered ERP systems are:
1. SAP ERP: SAP is the global forerunner in providing ERP solutions and has a comprehensive array of applications suited to both large and small businesses. The application is trusted by many because of its scalability and full functionality, which is available across various industries.
2. Oracle NetSuite: This solution is a cloud-based ERP which is especially loved by small and medium-sized enterprises. It includes an array of functionalities such as financial management, CRM, and e-commerce.
3. Microsoft Dynamics 365: The ERP solution which integrates with the other Microsoft products excellently has the flexibility and scalability. It is an option for those companies which want a well-known interface and a good integration.
4. Infor ERP: Infor is a company that creates industry-specific solutions and is recognized for its friendly user interface and reliability in analytics. It is a great pick for companies in the areas of manufacturing, healthcare, and other specific industries.
5. Epicor ERP: Epicor is mainly for Manufacturing, Distribution, Retail, and Services sectors. It also uses the modular approach which allows businesses to design the product as per their own needs.
6. Odoo: A completely open-source ERP platform that is seen as a highly customizable and cost-effective option. It is suggested for SMEs who wish to have a flexible system with a wide set of modules available.
7. Sage 300: Designed for small and medium-sized businesses, this solution was previously known as Sage ERP Accpac and boasts robust financial management features.

When selecting an ERP system, it is crucial to do a proper evaluation of needs, contemplate future development possibly reach out to an expert in ERP system implementation or consultant to find the system that best coincides with your company goals. Besides, it is also essential to evaluate whether there are local partners to support and if they are compliant with the local Law and Regulation, especially those in force in Hong Kong.