Smultron is described as 'text editor for Mac OS X Leopard 10.5 which is both easy to use and powerful. It is designed to neither confuse newcomers nor disappoint advanced users' and is a popular app in the Development category. There are more than 50 alternatives to Smultron for a variety of platforms, including Windows, Mac, Linux, BSD and the Web. The best alternative is Visual Studio Code, which is free. Other great apps like Smultron are Notepad++ (Free, Open Source), Sublime Text (Paid), Vim (Free, Open Source) and VSCodium (Free, Open Source).
- TextWrangler is the powerful general purpose text editor, and Unix and server administrator’s tool. View 75 alternatives to TextWrangler
The developers announced that development of TextWrangler has stopped, in favor of concentrating their efforts on the development of BBEdit.
Quoted from the TextWrangler webpage, "We are sunsetting TextWrangler, and we encourage anyone interested in TextWrangler to download and use BBEdit instead."