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Simple Mobile Tools is dead, long live FossifyX!
(feddit.de)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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There are clever ways to split software via different abstractions that allow to avoid some license features from affecting future developments too. That is to add new closed source features without relicensing the existing codebase.