Atom is a free and open-source text and source code editor created by GitHub for OS X, Linux, and Windows. It can be downloaded here, from the official website.
Packages for Love2D
Launching your project
The love-launcher package can open your project by pressing "Alt-L". Before this works, you need to input the location of the love executable. The love-ide bundle of packages has this feature as well.
The hyperclick-love package makes it so you can click on certain pieces of love code and open the corresponding love wiki page.
One solution to many problems is the love-ide package, which installs many other packages to add all of the features mentioned above, and more.