diff --git a/README.md b/README.md
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@@ -181,6 +181,8 @@ When learning CS, there are some useful sites you must know to get always inform
 - [Solid Tools for Developers](https://soliddevtools.com) : Online debugging tools for developers and system administrators
 - [OS Query](https://osquery.io) : Easily ask questions about your Linux, Windows, and macOS infrastructure
 - [LaunchPad](https://launchpad.graphql.com) : Appollo launchepad for testing GraphQl queries
+- [GraphOnline](https://graphonline.ru/en/) : Useful tool for visualizing Graphs
+- [Data Structure Visualization](https://www.cs.usfca.edu/~galles/visualization/Algorithms.html) : Perfect website for visually learning Algorithms
 - [IDE Onlang](https://ide.onelang.io) : Write in one language and get the same result in other languages.
 - [PullRequest](https://www.pullrequest.com/) : Code review as a service from vetted, professional reviewers
 - [Extends Class](https://extendsclass.com/) : Online developer tools: REST and SOAP clients, SQLite browser, testers (Regex, XPath, JSONPath) and other tools (Encoders, Converters and formatters)