Slack has become an essential communication tool for many teams and organizations. But beyond the core Slack functionality, there are a variety of free apps and integrations that can enhance your Slack experience. Here are the top 10 free Slack apps to consider:

1. Google Calendar: Sync your Google Calendar events directly to Slack to keep your team informed.

2. Giphy: Quickly search and share GIFs to add some fun and personality to your Slack conversations.

3. Polly: Create polls, surveys, and quizzes right within Slack to gather feedback from your team.

4. Trello: Integrate your Trello boards to track projects and tasks without leaving Slack.

5. Zoom: Seamlessly start or join Zoom meetings directly from Slack.

6. Dropbox: Share files from your Dropbox account and collaborate on documents in Slack.

7. GitHub: Get notifications about code commits, pull requests, and other GitHub activity in Slack.

8. Asana: Manage tasks and projects by connecting your Asana workspace to Slack.

9. Statsbot: Pull important metrics and analytics data from various sources and display them in Slack.

10. Donut: Facilitate casual interactions and team building by randomly pairing coworkers for virtual coffee breaks.

These free Slack apps can help boost productivity, improve collaboration, and make your Slack workspace more engaging and efficient