Create a simple Gantt chart, include link to software used

I need a simple Gantt chart. The software used must be freeware or very inexpensive. I do not need the software after this - and possibly one more - project, so I do not want to pay a lot for the software. Do not use pirated software. I will need the link to the software - or at least a screenshot - prior to award so I can see if the software is simple and what the cost is. I understand Gantt charts but have never used any Gantt software so I do not want large learning curve. Feature rich is fine - as long as I can get started quickly. The chart will have 11 main levels, which are as follows: brochures (main level) +4 levels/tasks (so 5 levels total, same for the rest - but see level numbers) website A +3 levels website B +3 levels website C +3 levels architect visits + 3 levels shop drawings + 2 levels cartaway + 2 levels stoneterra + 3 levels masons + 2 levels inserts + 6 levels Start the first main level today, second main level the next day, etc. have each one finish 3 weeks from now (I must be able to easily move these targets) Start each secondary level or task two days from the start of the parent, then two days later for the next one, two days later for the next, etc. I need to be able to: add levels/tasks easily move the target dates of the various tasks expand and collapse the main level and its tasks/other levels to simplify the view link start finish dates in different tasks (if possible - this is not critical if the software has other functions that are more important. colour code the levels set priorities alarms or pop ups - desired but not critical easily create other similar charts - templates are fine, simplicity of use is better I have excel, but found the Gantt templates too simple and difficult, so please do not use excel unless you can build a good case by showing me that it does everything I need. This should be a very fast project. I will not need any revisions once I receive it. If I have questions regarding the software, you should be able to answer them - there will only be one message with all questions, you will not be considered my "help line" If I really need help after that, I will pay for your time by adding a bonus or posting a small project.