We at Weava use Notion for our internal wiki, and Slack for internal communications. For our non tech task management, we use Trello. Beyond these traditional methods of approaching productivity and business management, the key is often to stay organised and save relevant information at the time of reading such and doing research. Using our product Weava, you can efficiently organise your research as it lets you highlight parts from any digital source (eg- websites, PDFs), make annotations and organise it into folders- which you can share with your employees. It enables you and your team to keep your research organised- instead of having to potentially waste time copying and pasting into long unorganised word documents or other tedious approaches.
Link to our chrome extension: https://www.weavatools.com/
I'm a big fan of Slack as well. Gmail and Grammarly too.
Recently, I started using ClickUp and I'm obsessed with it. It replaces a ton of tools that I was using including Asana and Toggl. Very flexible!