Do a quick search on the web for top ten iPad apps, or similar. You will get several and you can pick the ones you feel will be good. Also, on the Store (Apple) site, select the catagory you are interested in and enter some rough search criteria and then whenthey pop up, filter via most popular or highest rated. Easy as. Some have a free version and a pay for version. If in doubt, grab the free one and try it. If you feel it is worthwhile, purchase the pay for version.
AppAdvice, FreeAppReport, and IPadGadget are also some good sources for app reviews and up to date free app information. ☮ ♥