I ran into interesting tool today, it is a project estimator, task breakdown tool.
First it is free to use and interface is a little bit rought, yet it does work and breakdown of the tasks is really well done. Providing estimates is bonus on top of that. Honestly when you look at this, you realize that for realistic estimates you don’t really need significantly more then this.
Taking into account how many projects get started with less then this amount of planning, I find this tool very useful.