Syntaxic is described as 'Cross-platform, keyboard-friendly text editor' and is an app in the Development category. There are more than 50 alternatives to Syntaxic for a variety of platforms, including Windows, Linux, Mac, BSD and Chrome OS. The best alternative is Notepad++, which is both free and Open Source. Other great apps like Syntaxic are Atom (Free, Open Source), Sublime Text (Free Personal), Vim (Free, Open Source) and Eclipse (Free, Open Source).
Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.
CudaText is a cross-platform text editor, written in Lazarus. It starts quite fast (0.5 sec with ~30 plugins on CPU Intel Core i3 3Hz). It is extensible by Python add-ons (plugins, linters, code tree parsers, external tools).
TextMate brings Apple's approach to operating systems into the world of text editors. By bridging UNIX underpinnings and GUI, TextMate cherry-picks the best of both worlds to the benefit of expert scripters and novice users alike.
Light Table is a new interactive IDE that lets you modify running programs and embed anything from websites to games. It provides the real time feedback we need to not only answer questions about our code, but to understand how our programs really work.