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openalternative
A community driven list of open source alternatives to proprietary software and applications.
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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.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
I've built https://openalternative.co a month ago, but it's pretty niched down to software/saas applications. I think a more general one for broader selection of open source software would also be nice to have.
The code for OpenAlternative is on GitHub if you want to use some or take inspiration.
There's a lot of "Awesome" that various individuals have made to curate vertical interests. Example: https://github.com/vsouza/awesome-ios
You may appreciate the map of github [0] it's a fantastic piece of work that trended here a while back.
[0]: https://anvaka.github.io/map-of-github/
I had one of these recently! https://github.com/simonw/shot-scraper/pull/133/files
They're /incredibly/ rare though.