1. Zebra: Zebra gel pen is famous for its smooth writing experience. Their ink flow is consistent and their writing is smoother.

2. Parker: Both Parker pen and ballpoint pen have excellent writing performance. Their ink flows smoothly and is not easy to jam or break.

3. Mitsubishi (Uni): Mitsubishi's UM- 15 1 gel pen is an economical and smooth choice. It has durable ink capacity and consistent writing quality.

4. Pilot: Hi-Tec-C gel pens from Bai Le are a series of high-performance writing tools. They provide a smooth writing experience and are suitable for all kinds of paper types.

Delight: Delight D-30 1 gel pen, with smooth writing and durability, is an economical choice.

6. Jinwan: Jinwan is a brand in China. Their gel pens are usually of good writing quality and smooth.

All the above brands have a good reputation. You can choose your own style according to your own preferences and needs.