Pretty darn good

When looking to make photos from various sources match, the batch resizer is a must. Using the Lite version, I was able to successfully resize multiple photos to the same size, regardless of ratio. The other available options allow batch manipulations to several other restrictions and worked well.

Fairly simple to use and the app retains last-used settings which helps if your project spans a few days.

Av8r1973 about Resize Lite