Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
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.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
BucketListly - The most beautiful & advanced bucket list you will ever have
CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
BucketList.net - Bucket list ideas, advice and support