It's worth emphasizing what he says is the key thing about farr:
But the real, difficult-to-replicate edge it has over other programs like it is the community over at Donationcoder which has embraced it and continuously develops plugins for it that enable it to perform a wide range of tasks.
So let me express my thanks to everyone who has contributed to FARR, whether it be by making a plugin, sharing alias packs, suggesting and testing features, etc. Not only do you guys make the program so much better, but you are what makes it fun for me to keep developing it. Thank you!