What software do you guys use when capturing screen vids?  I'd rather not spend a ton of cash, as I'm just simply looking to show my workflow and get some tips on what I'm doing poorly/wrong/general-dumbness-on-my-part.

If you have an NVidia card this might be an option, never used it myself (yet):
http://blogs.nvidia.com/blog/2013/10/18/shadowplay/
 
 
Video here:
http://youtu.be/BaJdjSA_fas
 

Camtasia Studio has a fully-functional 30-day trial, which makes nice videos that are efficiently sized. If you only plan to use short-term, this is the simplest for you.
 
As I have Premiere, I was looking for a way to capture the desktop to feed Premiere and picked up Koyote's "Screen to Video" this morning based on this post (best answer part). They recommended several options there (Camtasia links are in there as well).

I don't know if this will work or not, but I will attempt to paste a URL for search results for Screen Capture, refined with filters for Windows and Free:
 
http://download.cnet.com/1770-20_4-0.html?query=screen+capture&platform=Windows&licenseType=Free&searchtype=downloads
 
Please note that while the Downloads.com web site certifies any software on their site is free of viruses, you MUST pay attention during the install process, because almost ALL software installs from there will have things like pre-checked boxes that will install all kinds of 'extra' software, like Google Toolbar, Coupon programs, and that sort of thing.  Just make sure you pay attention during the install, and you will be fine.
 
Hope one or more of the above will fit the bill for you.
 
Bob Bone
 

All of my earlier videos were captured with this freebie, CamStudio.
 
More than capable for most needs. Only try the Camtasia trial if you are resistant to buying great software. It's great but at a price of course.

thanks guys!

Another program that works is HyperCam.  The only thing I have not figured out yet (haven't tried to hard) is how to capture the audio of Sonar with the video as I don't think you can share the audio device with Sonar and HyperCam.  I think this problem extends to all of these video capture type programs.
 
I believe that the work around most people use it to run a cable out of their interface and back in again.  For myself, I could simply use my ASUS gaming audio card with the "what you hear" setting selected, but I don't think this would work on my MOTU, hence the audio cable.
 
 

Yep that's a good point Phonic. Audio capture from the DAW software at the same time as microphone capture can be a bit of a nightmare. I did get CamStudio working once but I'm not entirely sure how.
 
I use a mixer with a separate audio out nowadays but I also tend to do the voice capture and screens captures separately so it's not so much of an issue.

Ditto on Hypercam. For the audio aspect, I run two interfaces. Sonar works with the V-Studio using ASIO. I have an Octa-Capture running as WDM for Windows. The V-Studio audio out goes to the Octa-Capture audio in, which gets recorded in Hypercam.
 
This is how I did my Advanced Workshop videos. It was complicated enough to get Sonar, Vegas, Hypercam, and two interfaces working simultaneously that I had to write a mini-manual on how to do the setup.

Good thing I'm just looking to do a quick audio-less video! haha  Seems like a mess I don't want to get tangled in!