Auth0 Token Vault handles secure token storage, exchange, and refresh for external providers so you don't have to build it yourself.
Rolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
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Secure File Transfer for Windows with Cerberus by Redwood
Protect and share files over FTP/S, SFTP, HTTPS and SCP with the #1 rated Windows file transfer server.
Cerberus supports unlimited users and connections on a single IP, with built-in encryption, 2FA, and a browser-based web client — all deployable in under 15 minutes with a 25-day free trial.
Self-hosted search engine with web service to share discoveries with
...https://sourceforge.net/projects/ftserver-android/files/
The Code Repository includes
FTServer Android Version Source Code (Android)
FTServer Java Server Version Source Code (Linux Windows)
FTServer .NET Server Version Source Code (Linux Windows)
https://sourceforge.net/p/ftserver-android/code/
LinuxNews is a free software for Android 2.2 that allows you to get information about the Linux world, through RSS feeds, events and videos from YouTube. You can save content locally through the menu items and read them even without an active Internet connection.