Newbie question: Schematic diagram software?

Can someone recommend a schematics diagram software so I can draw and develop my project on the computer?

Thx!

Express Sketch
This is what I use. It is easy to learn and making your own components is easy, too.

Yes, that software is very easy to use. I use it all the time for forum discussions.
An example:

If you’re going to make PCBs eventually, then Eagle from www.cadsoft.de is much better.
I use that for all my designs, as do the Arduino boards.