Standalone Theme Directory Program?

I am a website designer and as such, I have bought, customized, and downloaded a lot of WP themes.

Problem is, in the years I have been doing this, I have made a number of themes and its getting difficult to remember what each one looks like or what feature they offer. Anytime I get a new account, I would like to have my themes handy so myself or the client can pick one and we can start building instead of starting from scratch.

I was wondering if anybody knows of a www.ads-software.com style Theme Directory Software or Program LIKE THIS that I can locally use to store and view thumbnails of my themes???

Sure I can Screen cap each one & manually list features but who has time for that, I have a business to run. The only other option I have found is to Wamp to set up a localhost and just add them all to the Wpcontent/Themes folder but its seems a little much, and is slow loading, just to view our themes. If there isn’t a software that can do it, how do these resell site display and even demo there theme?

ANY advice is helpful,