SourceCodeCounter is a useful tool that can help you count the number of blank lines, comment lines, and physical lines of source code for a variety of popular programming languages. It supports more than 100 languages and allows you to count code within compressed archives. The results can be sorted by language, files, blank, comment, and code.
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.
