This API is in the header of the README.md file

resolve #3028

resolve #3027

link does not work.

Move Duply and DynaPictures from development to Photography and improve description

Move Gyazo from Photography to Cloud Storage & File Sharing and improve description

resolve #3016

Update Catboy Api to Catboy

* Add Collective APIs Site in the Alternative sites

site: https://www.collective-api.ml

* Update Collective APIs link

Fungenerators Random Facts is now paid

It is not open-source, it is a paid service.

Mailgun only provides a testing tier. When this tier's limit runs out, you'll need to pay to keep using it.

ref: https://www.mailgun.com/pricing/
```
Try us out! Get 5,000 free emails per month for 3 months, then only pay for what you send

Pay As You Grow
```

Moved:
- ImprovMX
- mail.gw
- mail.tm
- MailboxValidator