Real Estate startups in the USA

Am just trying to (from memory) put down the various categories of RE startups popular in the US of A. Curiosity more than anything else:

1) Redfin/ Trulia/ Zillow: Classic broker driven marketplaces with a whole lot of data. Free for customers, charge brokers. Large listed companies

2) Urban Compass: Will assign the customer an agent for a personalised apartment search. Charge customer as well. Kick-ass model

3) Lovely/ Cozy: Rental marketplace where you can find homes for rent & also manage the rental payments etc

4) Realty Mogul: Crowdfunding real estate projects (using a trustee company which acts on behalf of all the people who contribute funds)

5) CompStak: Crowd sources lease rate data in the ultra competitive commercial leasing space. Uses an innovative method whereby brokers provide the data in exchange for access to data from others. Charges banks/ funds for access to the valuable data

6) 42Floors etc: Focussing on commercial leasing with very high end & close-to-real pics

7) Floored: Helps create videos for your space using 3D technology

Phew...thats a helluva lot of models and I am sure I have missed a few more 

Back after a break...with a thought..a few thoughts..

Am thinking there should be a campaign to reduce honking in our main cities. I know India has bigger problems, but I cant do much about them (right now). But I could probably galvanize some action around "no honking".  How should the campaign go? Lemme try & write it up:

Am very reliably told that writing indeed helps firm up thoughts.

1. Objective
Create a campaign to reduce honking- following a 3-pronged sequential approach:
- 1st: target car owners who drive
- Then: target drivers via their owners (i.e. owners who dont drive to tell their drivers to not honk)
- & finally: the auto & cab drivers

Its understood that a country like ours will need honking from time to time. Idea is to limit the honking to when it is critically required.

2. Specs
Name: No Honk
Tagline: Dont honk unless necessary
Logo: A horn with a cross against it

3. Details? Next steps? Along with Q marks..
- Create a working group
- Design logo
- Print stickers & badges
- Have a blog & FB page up & running
-Distribute the sticks & badgers at various places  (need to think this through, atleast in early phase. Eventually it could be distributed anywhere from a Coffee Day to a petrol pump)
- Targets? need some nos 
- How to measure impact? Critical to scale this..
- How much money is needed for a sort of Phase1?

Issues
- Working Group? Who can join?
-Who will distribute the stickers/ badges & how initially? - Best I can think of is to start with a bunch of offices...(someone distributing the stuff outside offices)

4. What I would like to know? & all of this should be part of the website/ FB updates
- The impact on BP of random honking
- Noise pollution impact of honking
- Situations when it is ok to honk (i guess when you are just about to hit a vehicle/ a living thing)
- When should you absolutely not honk?For e.g.,  avoid honking at signals..you know when the signal turns green & all honk- assuming that the jerk ahead of you would rather spend the afternoon on the road.

As with any thought converted to written words, more questions than answers......