easyPHP

Hi Guys/Girls I would be grateful if anyone can offer some advice, I need to set up a site for a local charity, the basis of it is content. Each content item consists of a photo a title / category / description. There would in total be a few 1000 entries into this and I would want to search by any of the fields available. I want to use PHP and mySQL as the database and have some webspace already that has a mySQL DB and runs PHP scripts. What I am looking for if it exists is any freeware that performs this kind of action that I could tailor to me needs. I guess this is kind of a content management system?, can anyone give me a clue where I could source a few good scripts or freeware that would help me out, thanks Melissa