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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.
First off, CriticMarkup is an "extension" to Markdown with syntax for addition, deletion, substitution, comment, and highlight. Knowing this might help you find tools which support it. I know MultiMarkdown Composer on Mac is one such tool.
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.