Flash programming standalone Gui Software tool for K32L3A60VPJ1AT .
we can write multi-image (bootloader and App1 app2 ) in flash
I've been using this with my K32L and the PE Micro FX pod:
https://www.pemicro.com/products/product_viewDetails.cfm?product_id=15320181&productTab=1
If you can't get the image you want from the linker, SRecord can build it:
http://srecord.sourceforge.net