This add-on allows you to browse spreadsheet created by someka.net, offering a wide range of categories such as project management, human resources, sales & marketing, accounting & finance, business strategy, data analysis in addition to calendars, timesheets, invoices, budgets, KPI dashboards, etc.
All templates are allocated in easy-to-access categories inside the gallery. So you can easily browse related categories to find the needed templates.
You'll find "yellow notes" inside each template. These notes explain how to use a particular template. Most of the templates also include video tutorial links, where you can watch how to use the tools.