Come on, find handy apps here
Smart code diff, you are looking for ...
Visual language-aware file comparison tool, support syntax-aware structured compare and 3way merge, can ignore newlines, comments and formatting changes, ...
For Windows 8, Windows XP or later
For Mac OS X Lion or later
Handy code editor, image preview...
Handy code editor and a image preview. Support "What you see is what you get" (WYSIWYG) on HTML, syntax verification and formatting on XML and JSON, edit SVG image and real-time preview, syntax highlight on many program languages ...
For Windows 10, Windows XP or later
For OSX 10.10 or later
For Linux/Ubuntu 14.04 x64 or later
To note, anytime anywhere...
FREE note utility which is open source, support image and attachment, easy to use, auto sync all notes to Notee Server, secure and reliable, and support multiple platforms and web access...