Yeah, sales module is one of the crucial modules for company growth. They can directly contact with customers and explain entire things about products. But nowadays many of the business owners take sales management tool. Previously, I worked in small company they use Apptivo for manage sales process. It can helps to make an sales person activities more effective, keep tracking all updates and more instances.
Sales process manage through manual way is pretty good, but sales software reduce time in details update, analysis, reports, sales performance.
A lot of resources available in online marketplace. Mostly, it's cost is low.