PlistEdit Pro is the most advanced property list and JSON editor written for macOS.

Mac and iOS developers must edit a variety of property list and JSON files while developing their applications. PlistEdit Pro makes editing these files easier by providing an intutive and powerful interface. In addition to being able to copy and paste or drag and drop property list data around, PlistEdit Pro also offers powerful find and replace functionality, as well as structure definitions which provide easy access to commonly used keys in various standard property list files.

Araxis Merge is the two- and three-way visual file comparison/merging and folder synchronization application. Use it to compare, understand and combine different versions of source code, Web pages and other text files, or even text copied and pasted from another application (e.g., Pages or Microsoft Word). Merge integrates with Time Machine, so you can compare older versions of files.