From his initial question it's not clear whether OP is referring to genome or transcriptome assembly tools...
The question is entitled "genome assembly tools" - that's clear enough for me :-).
Right :p I see that the question has also been modified, adding a bit of information.
That's why I went with 'a bit of information', considering we now know it's prokaryotic. That's an improvement on getting to an answer I would say. A small step forwards. It looks definitely like a strange approach to use amplicons. We also have no idea about read lengths, genome size, repeat lengths,...
Next time you want to assemble a small genome, get yourself a MinION sequencer :-D
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MIRA can be found here: https://sourceforge.net/projects/mira-assembler/
I don't know what kind of data you have, but the manual is pretty complete I would say...
Before we get a list of all known assemblers in answers below please modify this post to include what kind of genome you are working with (pro-, eukaryotic) along with what kind of data you have (genomic, RNAseq, illumina, pacbio etc). If the genome size/ploidy is known that would be useful to know as well.
This would help narrow the suggestions down to a list you can use right away.