I don't know which one is the

I don't know which one is the best but this one is a professional program and it's free!  http://www.3ds.com/products-services/draftsight/

Easy to use CAD

I've made my living for the last 25-30 years using professional CAD programs. ALL of them have a learning curve; some steeper than others. The worst are confusing, obtuse, and exasperating to use (British programs seem to be the worst, at least for me).

I tried hard to like XTrack, but found it very counter-intuitive. SCARM hurts my eyes (not kidding, it really does). Tried several demos of others, then found AnyRail. 

After an hour of playing with AnyRail, I felt comfortable with it, and was able to do most of the basic things without problems. The more I play with it, the more I like it. It has many usefull features, but doesn't get bogged down with bells & whistles most people don't want or use. It has lots of track librarys, and working with flex track is easy. The demo version is fully functional, just limited to 50 pieces of track and/or objects. This is more than enough to get the hang of it. For those of you running Linux, it works perfectly in WINE on Peppermint 4. 

Best thing is to download demo versions of everything and see what works best for you.

Easy to Use CAD

If you have a Mac try Empire Express by Haddon. Easy to learn and use, inexpensive though 2D without a lot of bells and whistles.

Dante

one document that I could post for comment.

If you have drawings you can just take a photo and post them. Learning Cad don't get any actual layout work done. I'm putting up benchwork now based on sketches I made last month. Things always look different full size in person so no reason to nail down a plan too detailed as you'll probably find a better way when you start cutting wood.....DaveB

XTrkCAD from start to finish

Not always true. Depends on how well you plan and how good you are at visualizing in your head. My XTrkCAD plan printed 1:1 was template for benchwork, sub-roadbed, and roadbed. Nothing changed from design to laying cork.

http://www.lkorailroad.com/goodbye-to-a-dear-friend/

XTrkCAD for me too

I had a little trouble getting the hang of it at first, but after a few hours it started to make sense.  One of the things I really like about XTrkCAD is that you can operate trains on your plan.  If you're building a layout for operations this is really, really useful. Not only does it point out things you might otherwise miss, it is also a lot of fun to run trains on your future layout.  I have printed out 1:1 pieces of my plan just to check them with real track, and it lines up perfectly. I can't imagine planning a layout of any size without it now.  I think any CAD program worth using is going to have a bit of a learning curve, you have to give it a chance.  Once you get it, you'll love it. 

Watch the tutorials on YouTube, that gives you a bit of a head start.  

Randy

I use CorelDraw

CorelDraw is not a CAD program. It's an illustrating tool, but it's what I work most comfortably in, so rather than mess around with a new program, I just used it.

My benchwork and trackplan were designed in great detail using this program and like Alan, no changes needed to be made when it came to building the beast.

You can plan it accurately using any number of tools and have it fit AND work just like you planned. Or you can "wing it". That choice is up to you.

As far as posting your design, I agree with the others, don't bother redoing it. Post some pictures of what you've got on paper. There's nothing wrong with that!

Cheers!

XtrkCad Vote

Ditto Alan and Randy -  Xtrkcad worked nigh on flawlessly from conception to 1:1 track prints.

You can run trains as well to test everything out.

Painful for first hour then you fly...........

Reading this I sound like a zealot and I instinctively distrust zealots! - however - I'm being honest

Rob
Cornhill & Atherton RR

Another vote for XTrackCAD

+1 from me for XTrackCAD

Thanks Michael

For the mention of Dassault, I happen to work for them

Might be a bit much for what you are intending to do. 

It's meant to built fighterjets and the likes and has specific processes written in for a particular industry. 

AnyRail

I have also found AnyRail very useful for layout design..  Like all drawing programs, it does take practice but it is intuitive.  

Deltacad

Easy to learn for buildings and such. Not sure how well it would work for track layouts.

SCARM free layout software

Try SCARM - http://www.scarm.info - the free track planning CAD designer.

I've made it to be easy and useful for model train track planning even for users without any CAD experience or knowledge. However, it can be quite powerful, giving you all needed features for creating wonderful layouts. See some examples here:

Track Plans & Railroad Layout Designs created in SCARM.

Hope you will like it

Mixy - Author of SCARM

AnyRail

I would suggest AnyRail. I looked at a bunch of other apps but ended up buying AnyRail and have found it to be intuitive and easy to use.

You can get a functional demo to try it out.

Good Luck,

John

From professional world

I use CAD software daily, and naturally I am a tad picky. I found Anyrail easy enough to use out of the box, but for component libraries and cost, XtrkCAD can't be beat. Now if you want to make something other then track and benchwork, Draftsight might be your best bet.

I said I am picky, well XtrkCAD exports to DXF, which Draftsight can open. Because I am designing an elevated section, not to mention a steel mill, I will design in XtrkCAD for the general layout, export to 2D for basic dimensional info and model in 3D using SolidWorks. I also happen to have models of locomotives and railcars from a side job, so I can also populate my model.