HTML color codes (#rgb, #rrggbb) underline.HTML tags completion with Tab-key (Snippets plugin).Binary/Hex viewer for files of unlimited size.Simple auto-completion (fixed list) for some lexers.Code tree (tree structure of functions/classes/etc in source).Syntax highlight for many languages: C, C++, JavaScript, HTML, CSS, PHP, Python, XML etc.It is extensible by Python add-ons (plugins, linters, code tree parsers, external tools). CudaText is a cross-platform free text editor, written in Lazarus.