[thibaut_barrere]

Here's what I use and recommend:

* Mike Cohn resources were the most helpful to me:

- free presentations around estimating and planning (eg: http://www.mountaingoatsoftware.com/presentations/131-agile-... and others on the same site)

- the "Agile Estimating and Planning" book (http://www.amazon.com/Agile-Estimating-Planning-Mike-Cohn/dp...)

- Mike Cohn "Agile Estimating and Planning" course (2 days) was worth taking

* Software estimation: demystifying the black art (http://www.amazon.com/Software-Estimation-Demystifying-Pract...) is a very useful book too

* For lightweight project management tool: I use a mixture of Acunote (for estimating and burndown chart - I even generate my quotes out of it using Ruby and Prawn) and Freckle to monitor the time spent.

I tried many other tools (including Mingle, Pivotal, etc...) but Acunote is the only one that works well for us.