Google's Web Store has only been up for a short time, but already has a stock of high quality business apps. Here are five that PCWorld finds worth looking into: 1) Rainmaker - A contact organizer that pulls information from sites like Twitter, LinkedIn, and Facebook, and insets it in your Gmail address book. 2) SpringPad - a notebook and ToDo list maker. Springpad can not only create notes, you can build notes using a web search for things like recipes, movies, books, and more. ToDo lists can be tagged for searcing and shaed online. 3) Simplebooklet - a presentation creator that can be accessed using a web browser instead of a projector. It works like other presentation tools, and presentations can be shared via social networking sites or imbedded in a web page. 4) World Time Planner - Doing business internationally? Now you can use this app to find out the time anywhere in the world within 24 hours. 5) Read Later Fast - This is exactly what it sounds like. You can save pages to read later, even if you are offline. More details can be found here.