Freeware
/ˈfriːwer/
Definition 1 of 1
Pro Tip 1/3Cost Implications
Freeware does not require payment, though donations may be welcomed by the creator. 
Although the antivirus program is freeware, the developers appreciate contributions.
Pro Tip 2/3Usage Rights
Even as freeware, some programs restrict how you can use them, like no commercial use. 
The freeware license states you can't use it for your business.
Pro Tip 3/3Hidden Costs
Some freeware might offer premium features that require payment, so check before using. 
This photo editor is freeware, but you'll have to pay for advanced filters.