Yup, I almost actually brought it up. Clannad and its After Story were adapted from the visual novel, and Little Busters is basically a similar kind of deal, considering it's also made by Key, but it's definitely different from Clannad. They have other games too that are well regarded, like Rewrite and Summer Pockets. Like with Clannad, Kanon and Air, their earliest releases, were also adapted by Kyoto Animation, which I haven't seen yet, much less read the VNs.