The selection of the optimal ERP system for a business in Hong Kong or elsewhere is highly dependent on different factors, including the size of the business, industry, specific needs, budget, and the existing IT infrastructure. However, there are some ERP systems whose functions have been widely acknowledged and popularity in Hong Kong and worldwide. Here are several of the most remarkable ones:

1. SAP ERP: SAP stands out as the leading ERP provider worldwide, topping the list with its high-quality solutions designed for businesses of all sizes. It provides a wide array of different modules that one can configure according to the specific needs.

2. Oracle NetSuite: This is one of the most common cloud-based ERP solutions, and it is suitable mainly for small and medium enterprises. It is a combination of many applications that assist in controlling business operations across different sections.

3. Microsoft Dynamics 365: This ERP solution partners with other Microsoft products and can be configured easily. It also has the advantage of scalability, meaning that it can be used by different business sizes and types.

4. Infor ERP: Infor is popular for its range of special industry solutions, the platform is also easy to use and contains extensive features.

5. Epicor ERP: Epicor targets manufacturers, distributors, retailers, and hospitality providers and cuts on their operational time, hence it is a perfect match for them. The solution provides specialized functionality which enhances physical and moral efficiency while streamlining processes.

6. Odoo: An open-source ERP solution that is highly customizable and cost-effective, making it a popular choice for small to medium-sized businesses.

7. Kingdee: This is an ERP provider based in China that sells its solutions and products throughout Hong Kong and adds value to businesses in the region through direct-tailored services.

8. Yonyou (UFIDA): Yonyou is a Chinese company that specializes in ERP systems and offers a broad spectrum of solutions for various industries. The company is well-placed to serve enterprises in Hong Kong and the Greater China region.

In the selection phase of an ERP system, it is crucial to first carry out a proper assessment of your needs, think about the possible growth in the future, and perhaps some consulting with an ERP expert in case of uncertainty about the programming display in accordance with your company goals.