Question: I've got a bunch of projects now that I've imported into Eclipse and they all show up in the Package Explorer of Eclipse.

So, I've got a list of around 30 packages (and growing!). 

Can you only show the top 10 packages (but have the option of seeing previous packages if necessary - like Microsoft Word where you choose Open Recent and get a More option for previous files)?

Answer: 
There's no "Recent packages" feature but you can configure package view by pressing the arrow in right upper corner and using `Filters...`. Then you can exclude "Closed" packages from being shown and close these you are not working with at the moment to get them hidden

![enter image description here](https://i.stack.imgur.com/lnNix.png)
You could either create multiple Working Sets and collapse all but the one you need right now. Or you could use multiple workspaces.

Either ways i dont think you can only show the most recent packages, but you can bring more organization in your package tree.

I would recommend Working Sets - personally i have quite a few of them and never had too much packages visible to cluster my screen.