If you don’t develope apps, these sites are not for you
https://makeappicon.com/ – create icons for your project in a moment.
https://sketch.io/sketchpad/ – a good site to draw icon (1024×1024)
https://www.raywenderlich.com/tag/uitableview – this site seems to be full of usefull tutorials.
http://www.textfixer.com/tools/remove-line-breaks.php here we can get rid of all line breaks in our code.
http://resizepiconline.com/ site to resize images.
https://translate.google.ru/ quick translate. I actually often need it.
https://www.iloveimg.com/ru/compress-image best way to compress image