There are a few that will do this but one which ranks highly is Locus.
You can obtain the free version here or go for the paid version here.

 

I don't know where you live so this may not be relevant to you but...

I already have a large collection of Memory Map maps of the UK so I bought MM Tracker and I can view them (set routes, waypoints etc) on my SGS2. It works very well and was a cheap option if you already have the maps.

 

Nice one.... I had a collection until we moved. Never found them since.
Used to use them with my PC.
Never tried the Android version.. Do you find MM Tracker limiting, especially with the new crop of GPS Off-Road Apps?

 

I use my maps for walking and climbing so I usually know where I am and where I'm going. In this situation MM Tracker does exactly what I need. I think that most mapping apps are limited by the quality of the maps themselves and that is something that the Ordnance Survey leads the world in. OS maps are of course excellent - clear and accurate. I have a full set of Landranger 1:50k maps and a lot of 1:25k for places worth walking (eg the Yorkshire National Parks - not that I'm biased ) so I want to make use of them.

I'm glad they don't go out of date quickly, replacing this lot would be expensive.

 

I know exactly what you mean..... I spent an absolute fortune compiling areas around the UK.
I had both 50 & 25 as well as National Parks and a good few others.
The only one's a managed to recover were the one's I had on my Laptop at the time and believe it or not they were for a different area I don't normally frequent so all in all, all lost forever.

The only thing that has stopped me purchasing them again is the other software titles which are more powerful.
However, as you correctly say, you do not get the same level of detail as that found in OS maps.
Okay, I could import some of the OS data into the Apps but it's an area I don't have the time to follow up on at the moment.
As such I can only go with what's currently available as a 'package' on the Android App list.

 

I used NAVIGON on my iPhone 3GS and will be buying that on my shiny new S2 too.

 

Try Galileo. I use it for offroad navigation and orientiring. It's quite good.