Wii Backup Manager is free software.
A lot of effort has and will be put into making it as stable and feature rich as possible. If you find it useful and want to show your appreciation, feel free to send me whatever you feel you can afford.
I've set up a few ways that you can contribute below.
Donate via PayPal
View an ad to donate for free!!
By clicking on this link, you will be taken to a page where an ad is visible for 5 seconds. After 5 seconds, click skip and you will be redirected to a thank you page at wiibackupmanager.co.uk, simple eh?