Free
TimeTK
TimeTK is an open-source R package designed to simplify time series analysis by providing tools for visualization, feature engineering, and data preprocessing, ideal for forecasting and modeling tasks.
Free
ChartDB
ChartDB is an open source time series database designed for efficient storage and querying of large-scale metrics and monitoring data. It supports high ingestion rates, SQL-like queries, and integrates with visualization tools like Grafana.