Why are you asking? Google has announced that they will terminate a few services but I didn´t see anything related to the Goole Apps Marketplace. Have you got any information?
you are certainly right for desktops apps (download.com, softonic etc,.. are great sites) However for business software the situation is slightly different if you cannot afford the usual suspects (Oracle, SAP, etc,..) The good thing about those tool bars is that you can add and remove them easily when you don't need anymore. thks for the feedback in any case
The challenge with generic search engine is the amount of un relevant results you will get. Try niche software product like farm management software and you will get 6.M results. You need a more efficient way to find and review business apps (with advanced filters capabilities) this is what getapp.com is about