Topcoder Alternatives [Page 3]

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

Geektastic is a platform that manages peer reviewed code challenges supported by a community of qualified software engineers.

FlexiQuiz is a powerful online test generator that enables you to create engaging online quizzes, tests, or exams in minutes. Choose from 100's of features to create a customized quiz that meets your objectives for business, education, or fun.

Try for free freemium $25.0 / Monthly (Essentials plan)

Yuml.me is a legit modeling tool that comes with the strategic measure that let teams and individual create diagram more quickly via simply typing plain text.

Web development tutorials on HTML, CSS, JS, PHP, SQL, MySQL, PostgreSQL, MongoDB, JSON and more.

Online diagramming application

Open Source

Python Principles is an online learning platform that helps beginners learn Python programming from scratch.

Eclipse Papyrus is an industrial-grade open source Model-Based Engineering tool. Eclipse Papyrus has notably been used successfuly in industrial projects and is the base platform for several industrial modeling tools.

The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE.

Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.

py.CheckiO - Python practice online. Improve your coding skills by solving coding challenges and exercises online with your friends in a fun way. Exchanges experience with other users online through fun coding activities.

StarUML

Rosetta Code is a programming resource that provides example problems of how to write the same...