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URL radio and antennapod have android auto integration
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Firefox can be used for offline translations: just go to about:translations
- now there is a separate app using the same engine that also has ocr “offline translator”, check it out
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handy news reader: you can set up filters for feeds. So if you are interested only to articles about a certain topics from a generalist website, you can use this feature
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image toolbox has a very handy OCR integration
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the best tetris version you can play on android: lemuroid emulator + apotris, an open source Tetris clone for GBA, maybe the best in existence
I usually do this with a specific degreaser, but once or twice I used soap and woter and it worked very well. Just make sure to use a dry cloth on your chain to avoid rust and after a few hours grease it again.