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Shadowsocks is a networking proxy app that routes your traffic through a secured SOCKS5 tunnel for private and reliable browsing.
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J2ME Loader is a J2ME emulator app that runs classic Java mobile games and apps on Android.
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Optimize your WiFi network using WiFi Analyzer (open-source)
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Dcoder compiler: a mobile coding IDE to build projects, code & learn algorithms
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Java console for Android, editor with auto complete and apk builder.
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Powerful and Essential Tool for Android Developer. ✓Surprise ✓Automation
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Mimo is a coding education app that teaches programming through interactive lessons and projects.
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anWriter is a text editor for web programmers (HTML, CSS, JavaScript)
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A full functionality editor for OpenOffice / LibreOffice documents
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K-9 Mail is a 100% open source, privacy focused email client for Android
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Learn C and C++ programming with the most user-friendly C/C++ IDE on Google Play
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Pascal editor and compiler for Android
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ConnectBot is a powerful open-source Secure Shell (SSH) client.
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Learn to code free of charge on your phone in as little as 5 minutes a day.
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Manage files on the SD card with OI File Manager.
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Open source XMPP (Jabber) client with multi-account support
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FreeOTP secures your online accounts using one-time passwords.
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Simple, easy to use, ad-free tally counter.
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Learn C# anytime, anywhere!
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CommCare is a mobile platform supporting frontline workers (Long Term Support)