Updated useful links + added learncpp

English/CommunitySources.md

@@ -11,7 +11,7 @@
 
 ## Popular C++ conferences 
 
-- [C++ Russia](https://cppconf.ru/)
+- [C++ Russia](https://cppconf.ru/en)
 - [Cpp Con](https://cppcon.org/)
 - [Meeting C++](https://meetingcpp.com/)
 - [C++ Now](https://cppnow.org/)
@@ -25,7 +25,7 @@
 
 ## Alternative sources for learning C++
 
-- [The ancestor of the roadmap idea](https://www.cjdb.com.au/sg20-and-videos.html)
+- [Learn C++](https://www.learncpp.com/) - It is a free website devoted to teaching you how to program in C++. It's being updated regularly.
 - [Collection of various C++ resources](https://awesomecpp.com)
 - [Cpp con (back to basics)](https://www.youtube.com/playlist?list=PLHTh1InhhwT5o3GwbFYy3sR7HDNRA353e)
 - [C++ course for language basics](https://www.learncpp.com/)

English/Grades/Overview.md

@@ -9,7 +9,7 @@ Nowadays, you can meet the following common grading approach. It is possible to
 
 Each company has its own vision of developers grading and a set of skills/responsibilities declared for different levels. It's really simple to meet the following case: you will be promoted as a senior in a first company, but if you go to another one you will be assessed as a middle. Despite all, it's possible to introduce common expectations for each level. We will use a simplified approach declared before to describe each grade.
 
-**Example:** You can check this website to get knowledge about leveling systems in different companies: https://www.levels.fyi/
+**Example:** You can check this website to get knowledge about leveling systems in different companies: [levels.fyi](https://www.levels.fyi/)
 ![](https://github.com/Salmer/CppDeveloperRoadmap/blob/main/Russian/Grades/Source/GradeTable.PNG?raw=true "GradeTable")
 
 

Russian/CommunitySources.md

@@ -26,7 +26,7 @@
 
 ## Альтернативные источники для изучения С++
 
-- [Прародитель идеи по дорожной карте](https://www.cjdb.com.au/sg20-and-videos.html)
+- [Learn C++](https://www.learncpp.com/) - Бесплатный учебник по изучению C++, постоянно дополняется.
 - [Коллекция различных ресурсов по C++](https://awesomecpp.com)
 - [Cpp con (back to basics)](https://www.youtube.com/playlist?list=PLHTh1InhhwT5o3GwbFYy3sR7HDNRA353e)
 - [C++ курс для изучения основ языка](https://www.learncpp.com/)