Coming up with ideas for web tools can be as diffcult or as easy as you want it to be. You can have very simple tools that provide a basic feature – for example a tool that can calculate mortgage repayments, or one that finds the nearest driving test center when you type in a post code. Or you can go for more complex tools – a tool that helps to plan a journey, or one that gives you recommendations on what books to buy based on what books you already own.
Simple or difficult, web tools must have all one thing in common – simple input, detailed output. The user must do the minimum amount of work and yet get a lot of information back from the tool.