GWordBook is a professional wordbook software. You can create your own wordbooks or download several free wordbooks from the web. For example you can find several wordbooks on PocketGear.com. All wordbooks are textfiles that can be created/opened with a text editor. A special algorithm in GWordBook enables fast searches, f.e. a search in a wordbook of 2 MB size takes only a few seconds. The wordbooks for the GWordBook software are freely available. You just pay for GWordBook once. GWordBook is trialware, which means you can use it 30 times. Afterwards you have to register.