First of all make sure they downloaded properly. Swipe down on the notification bar on top, there it will tell you whether the download was successful. If so tap on it to see if it will open and install. Not knowing what "market" you have I can't advise further on that. Freewarelovers is a good source for apps. If you need more help just ask. Remember you can search this forum - up at the top.Also the sticky threads at the top are a great source of info.
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