Automatic collager photo maker offline

[Contro]

Some platforms have tools to do this : wordpress, facebook, etc. But I need post in several ways and need an independent tool to do this.
Better is offline.
With the possibility of manual collage.
Better is portable.
Much better is free.
Best Regards

[IainB]

Picasa has always had this. It's rather well-implemented too.
Refer: Re: Picasa to be 'phased out'

[Contro]

I have tried one of these options :

http://listoffreeware.com/list-of-best-free-collage-maker-software-for-windows/

but the program Pos Free Collage Maker seems not to be compatible with windows 8.1.
Others go well.

More :
http://www.freemake.com/blog/top-5-astonishing-collage-makers-for-windows/

[Contro]

Picasa has always had this. It's rather well-implemented too.
Refer: Re: Picasa to be 'phased out'

I think i will adopt the plugin for Paint.net


Thanks a lot