Original author's page which features this free version and a payed version, which includes a lot more presets not included here. Another external repository can be finded here
Real-time preview: Design and see the result in the 3D viewport. Super fast rendering: it needs only 1 sample! Custom presets: 23 presets in the first release and more to come. Save, load: you can easily save your creation and reuse it any time, or even share it. Non destructive workflow: once you create a lens flare, you will need the add-on just to edit it, you can even disable the add-on and the lens flare will still work, it's great for sharing your blends or sending it to a render farm ... Animation ready: The add-on generates an advanced rig to control the lens flares. Camera border detection: if the lens flare is no longer visible by the camera you can make it fadeout. Obstacles detection: when the lens flares is obscured by a 3D object it will disappear. Blinking: make the lens flare blink.
GPLv2