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intellij-plugins
Open-source plugins included in the distribution of IntelliJ IDEA Ultimate and other IDEs based on the IntelliJ Platform
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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.
As I said, they are very upfront about what you're gonna get [1]. The table shows the difference between paid and open source versions.
[1] https://www.jetbrains.com/idea
With VSCode, it's not obvious. Whenever it comes up in HN, we feel it's open source. When one goes to it's github, one feels it's MIT licensed. That's why there are at least 3 issues in the VSCodium github asking why remote extensions are not working. It's like the excerpt from the 'Halloween documents' I commented above.