These tools help you accept Bitcoin only.
Non-custodial Bitcoin services
Lighting Network payments processor
Payments Processor *
Sell things for Bitcoin (uses OpenNode) *
Lightweight donations page, embeds and payment gateway
Bitcoin invoicing and task management
* Opennode is fully custodial meaning you do not have your private keys, thus you are not guaranteed full control of your funds. You can (and should) set reoccurring withdrawals to send any Bitcoin you receive to your own wallet. You are now also required to submit KYC Documentation to be an Opennode merchant.