Free HDR software?

[Scam]

Probably been asked a million times, but couldn't find a recent thread. I'm not really a massive HDR person, but have a few landscapes that I bracketed and want to merge. I use LR 5.7.1 which doesn't have photo merge (or whatever it's called). What's a good bit of freeware please?

Is the best workflow to merge then chuck them into LR?

Thanks.

 

[Scam]

Great thank you. I will check it out this evening! Does it plugin to LR or is it standalone?

 

[Scam]

It's a standalone but can export to LR I believe.

You can actually load HDR Efex easily from LR. When you save the file from HDR Efex it pops it straight into your library next to the originals. Works very well. Thanks again for the recommendation.