An Ugly But Useful Sheet is a spreadsheet containing lots of software discounts.
You can read the project description here.
中文介绍:我制作了一个“很丑,但很有用的表格”
The Sheet is hosted online, publicly accessible.
Visit the blog for more detailed info: https://ubusheet.blogspot.com/
I update the Sheet manually, and the older versions are stored here in backup folder.