As of my last update in September 2021, Rundeck is an open-source automation tool designed to help manage and automate workflows in IT operations. It allows users to define and schedule a series of tasks or jobs that can be executed on multiple nodes or servers. Rundeck is particularly useful for automating routine operational tasks, managing complex workflows, and handling ad-hoc operations across various systems.

Key features of Rundeck include:

1. Job Scheduling: Rundeck enables users to schedule jobs to run at specific times or intervals, automating repetitive tasks and reducing manual intervention.
2. Node Management: It allows you to manage and organize nodes (servers) into specific groups, making it easier to target specific sets of nodes for job execution.
3. Workflow Visualization: Rundeck provides a web-based interface that allows users to visualize and manage complex workflows, making it easy to understand the execution sequence of interconnected jobs.
4. Job Execution: Users can execute jobs manually through the Rundeck interface or trigger them programmatically via REST API.
5. Access Control: Rundeck offers role-based access control, allowing administrators to control who can view and execute specific jobs.
6. Notifications: It supports notifications via email, Slack, HipChat, etc., to keep stakeholders informed about job status and outcomes.
7. Plugin System: Rundeck has a plugin architecture that enables users to extend its functionality and integrate it with other tools and services.