Useful Tools

Because of software policy, I can not access some useful tools such as Visio, Ms project.
I'd like to share some free tools with you.
1. http://ganttproject.biz/
GanttProject is a free and easy to use Gantt chart based project scheduling and management tool. Our major features include:
Task hierarchy and dependencies
Gantt chart
Resource load chart
Generation of PERT chart
PDF and HTML reports
MS Project import/export
WebDAV based groupwork

2. http://projects.gnome.org/dia/
Dia is a gtk+ based diagram creation program released under the GPL license.

Dia is inspired by the commercial Windows program 'Visio', though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.

It can load and save diagrams to a custom XML format (gzipped by default, to save space), can export diagrams to a number of formats, including EPS, SVG, XFIG, WMF and PNG, and can print diagrams (including ones that span multiple pages).