Best software for link Exchanging

I wanna know that what is the best software for link exchange, or what are the best softwares for this purpose. Please mention all free and paid softwares you use or used and tell me how they work, no need a full description, but a small explanation will be fine enough.

Link exchange is a dangerous thing, beware of it, it might lead to a google ban.

I know that dude, but I wanna software, just for a small work. Not to use it for good sites.