I can incorporate our company logo into it. 

@David Hunter One of the more useful items I've seen before is a multi-device charger similar to this one:It has great shelf life with a branded logo, but I'd like to think of something as relevant to real estate as possible while still being useful.

Do yellow letters work best for them, postcards, or letters with company logo/letterhead? 

Maybe worth it to walk, but in business and finances, keep the that pathos mind suppressed and that logos mind at the front.  

By that I mean on the first touch could be a postcard, the second touch could be a letter, the third touch could be a zip letter, fourth can be another yellow letter and fifth can be a professional typed letter with company logo.

Hell, I may even add in some clip art of my logos and photos of testimonials from my deals.DMM is so saturated, I've been feeling like I literally just need to just completely stand out.

@Allende Hernandez, your Pro account allows unlimited calculator uses AND you can save the analysis as a PDF - and add your company logo if you have one - and send this PDF to anyone you would like.

Does anyone recommend an application for designing a logo (word, photoshop, apps, etc).

Does anyone have any recommendations on who or where to go to get a professional design for a company logo and how much one should expect to pay for such a design?

If you are a wholesaler or a lender or some other type of vendor you can post in there and would be worth it.You get to have a logo in your signature which could help drive awareness, and I think at one time you had to be a member to have a video introduction on your profile?