Rufus-Scheduler

Supports cron, every, interval, at, and in jobs with natural language parsing using fugit, allowing expressions like 'every 3h10m' or timezone-aware strings like '0 22 * * 1-5 America/Chicago'.

Uses a pooled thread model with configurable max_work_threads and job-level options like overlap: false and mutexes to prevent race conditions, ensuring efficient execution.

Offers features like job tagging, pause/resume, timeouts, and first/last execution bounds, enabling fine-grained control over job lifecycles directly from the README examples.

Integrates tzinfo via et-orbi for accurate timezone handling in schedules, crucial for global applications, though it requires ENV['TZ'] setup on some systems as noted in the FAQ.