XLogo is a Logo learning and drawing application built for Mac OS X. Logo is a dialect of Lisp, and was first developed in the 1970's to be used as a teaching language. XLogo implements a subset of this language. It is an open source, designed to be easy to use, even by young learners.
Debug Domain Name Servers with a handy networking developer tool.
Simple-to-use web form builder.
HTMLValidator is a Mac OS X app that validates web pages.
It defines a set of parsing rules for all markup, whether valid or invalid.
Open your code selection in carbon.now.sh from the Xcode editor.
Search for, compare, and choose the right symbol from SF Symbols.
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