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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
RedHat Keycloak is an Identity and Access Management tool. Features include user federation, robust authentication methods, user management, and fine-grained authorization. Grintor describes it as an "open source alternative to okta.com."
Element is an open-source instant messaging client built on the Matrix protocol, offering users features such as end-to-end encryption, file sharing, and voice/video calls. The self-hosted version accommodates up to 200 users at no charge, providing a budget-saving secure and collaborative communication platform. perthguppy describes it as a "slack style team chat."