Hello,
Yes, scientists use the Tuxedo suite (available on the public Main Galaxy http://usegalaxy.org) for bacterial genomes, forums like biostars.org and seqanswers.com will have more discussion about the processing, as will publications in your field. Alternate tools/packages have also been wrapped. All are available in the Tool Shed, for use in a cloud or local Galaxy.
http://usegalaxy.org/cloud
http://usegalaxy.org/toolshed
http://toolshed.g2.bx.psu.edu
Other public Galaxy's tools sets may also be of interest (may or may not be in the Tool Shed, and many offer public accounts/processing).
http://wiki.galaxyproject.org/PublicGalaxyServers
And here is a blog forum that is more specific to the task, to help provide some leads.
http://www.rna-seqblog.com/detecting-and-characterizing-circular-rnas/
I just saw Bjoern's reply (to the original sub-post) and second this - really any tool that you want to use can be added to Galaxy and used. Galaxy is used for more than bioinformatics, even.
http://wiki.galaxyproject.org/Develop
Best, Jen, Galaxy team