Google Spreadsheets Gantt Chart (Microsoft Project-like)

Google Spreadsheets is a powerful web application to do everything you do using Excel.

A nice way to use it is to manage a project plan with a gantt chart (microsoft project-like) and share it on-line with your team.This is a free and versatile solution to do that. This tutorial illustrates how to use Google Spreadsheets Viewpath Gadget to implement it.
(Link: Google Spreadsheets Gantt Chart (Microsoft Project-like))