Figma is a collaborative design and brainstorming tool that my company recently embraced. It has been great for creative endeavors when combined with Slack.
For team collaboration across different departments, popular tools include Slack for communication, Trello or Asana for project management, Google Workspace for document sharing, and Microsoft Teams for video meetings and file collaboration.
Our team uses Notion to document down plans and tasks for each department. On top of having really nice and detailed documentation, we also hold regular weekly sync up across departments which I found really helpful to understand what each department is doing. This might not work if the company is huge, but for a smaller team, it's pretty helpful.