Do You Even List? - Auto updating Twitter list of people you interact with most
BucketListly - The most beautiful & advanced bucket list you will ever have
Listr - Listr lets you explore some of the best lists on Twitter, curated across your favorite categories.
iBucket - A social bucket list apps that helps you achieve your goals & trips. Available for iOS, Android and Web. Dream it. Plan it. Do it.
Vicariously.io - Create Twitter lists based on the follows of other users
BucketList.net - Bucket list ideas, advice and support