Project Management Programs Probation

I tried some free project management programs these days.

Project Engine 2007 from download.com.
Air Todo from download.com. It request JRE 6.0. My product request JRE 1.4.2. I can not executed it at all.
SharePlan from download.com. When I open this program, I do not know what to do.
GanttProject from sf.net. This is a wonderful product. It use XML to save file. It is able to import MS project. the gantt chart is professional.

Project Engine 2007 has lots of features and easy to create project and task. However, there are too many input fields in the task detail page. I don't know how to create and assign a task.
It does not allow directly input task's start date and end date. When you start a task, it automatically set start date; when you complete a task ,it automatically set end date.
I hope it provides following features from PSP:
1) Pause a task
2) Remember both date and time. Generally I complete many tasks in one day.
My suggests:
No. 1 GanttProject
No. 2 Project Engine 2007本文出自 “威尔金的IT博客，51CTO” 博客，转载请与作者联系！