Are all of those companies your partners already or do you have plan to make partnership with them in near future? Having Microsoft, Oracle and Hewlett Packard as partners would make any project a huge one. But in this line of work, almost 99% times fake projects add names like those on their website's partners tab to create fake buzz! So are they really your partners?
Its just probably an eye candy to add in their project legitimacy. Although such actions are considered misleading but most devs got some back story why they use logo's of different companies. I remember one ICO that put Microsoft logo in their website but it doesn't mean they are partnered with them, they are just simply using MS software in their company