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Delta
Delta is an all-in-one classic video game emulator for non-jailbroken iOS devices. (by rileytestut)
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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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uYouPlus
uYou+ is a modified version of uYou (made by @MiRO92) with additional features and mainly made for non jailbroken users!
I don't think that this will convince you but it's open source (https://github.com/altstoreio/AltStore), and you could an Apple ID specifically only for signing (https://faq.altstore.io/getting-started/troubleshooting-guid...).
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.