gedit

The official text editor of Gnome desktop environment is now ready to run on Windows. It is really efficient and totally free. Is has been very successful in other desktop environments and that would be a good reason to give it a try. Very versatile, it can highlight a good number of programming languages, among them we can highlight C, C++ Java, Python, Fortran, Haskell, SQL, PHP or Javascript. It consumes very few resources, which makes it very useful if don't have a powerful computer or if you need to open several documents at once. Finally, if the features included aren't enough, it also supports add-ons which makes gedit even more powerful and useful.