This is a list of software (SaaS, PaaS, IaaS, etc.) and other offerings that have free tiers for developers. http://free-for.dev/
It contains well written, well thought and well explained computer science and programming articles, quizzes and https://www.geeksforgeeks.org/
https://microservices.io/ https://refactoring.guru/ https://highload.today/ https://highload.guide/blog/highload-for-beginners.html
Приоритетные направления - язык C# Данный сайт посвящен различным языкам и технологиям программирования https://metanit.com/
Lepton is a lean code snippet manager based on https://github.com/hackjutsu/Lepton
Пятиминутка PHP https://5minphp.ru/
Между скобок (PHP) https://soundcloud.com/between-braces https://soundcloud.com/productandgrowthshow
Product&Growth Show https://soundcloud.com/productandgrowthshow
https://deworker.pro/edu https://elisdn.ru https://ru.hexlet.io/u/new https://acloudguru.com/
https://www.generatedata.com/ https://www.vccgenerator.com/
http://www.sql-tutorial.ru/ru/content.html
Пятиминутка PHP https://5minphp.ru/
Между скобок (PHP) https://soundcloud.com/between-braces https://soundcloud.com/productandgrowthshow
A curated list of awesome PHP libraries and resources
https://github.com/ziadoz/awesome-php
http://pronskiy.com/php-digest/
https://habr.com/ru/search/?q=PHP-%D0%94%D0%B0%D0%B9%D0%B4%D0%B6%D0%B5%D1%81%D1%82+#h
https://www.planttext.com/ https://yuml.me
https://online.visual-paradigm.com
https://gitea.io/en-us/ https://habr.com/ru/company/it-grad/blog/438576/
https://habr.com/ru/post/414009/ https://www.fullstack.cafe/blog/php-interview-questions https://www.codewars.com/ http://codekata.com/ http://codingdojo.org