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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.
CDE is quite old and insecure, it isn't worth the hassle. Instead I recommend looking into NsCDE a CDE clone using fvwm. While I don't like giving alternatives instead of possible solutions I think it's definitely time to give CDE up.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.