Update doxie license from unknown to gratis

Gratis application, requires purchase of hardware to be useful
Refs #8169 and #8213
Update dropbox license from unknown to gratis

Gratis application, subscription-based services if desired
Refs #8169 and #8213
Update evernote license from unknown to gratis

Gratis application, subscription-based services if desired
Refs #8169 and #8213
Update ngrok license from unknown to apache

https://github.com/inconshreveable/ngrok/blob/master/LICENSE
Offers subscription-based services if desired
Refs #8169 and #8213
Update toggldesktop license from unknown to bsd

https://github.com/toggl/toggldesktop/blob/master/LICENSE
Offers subscription-based services if desired
Refs #8169 and #8213