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Omeka
A flexible web publishing platform for the display of library, museum and scholarly collections, archives and exhibitions.
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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.
There are some great visual archives online that might serve as inspiration. Free tools to create them include Collection Builder, Omeka, and some other free, open source repository software. Most of their sites have links to projects that people have built using their tool, and I find them super inspiring to scroll through and get ideas for projects like yours.
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.