Software to inventory vinyl collection

I like the discogs idea. It really depends on how long and what you want to do with your list. 

Collectorz 

http://Collectorz.com

I use Excel. 
 

Easy to use. Likely to be readily available in twenty years. You don’t want to get caught in something that goes away.

Discogs. If most of your music has a barcode its even easier.

Discogs is made for this.... I have my entire collection of LP's, CD's, and music DVD's cataloged there. It's very easy to show it to other people too if you want to - just give them your username and they can go to Discogs see what is cataloged under it.