Pytition

Why using Pytition?

Because it allows you to host petitions without compromising the privacy of your signatories.
No tracking, ever: CSS, JS and all resources are self-hosted. Pytition does not use CDN.
Nice UI: Bootstrap 4 + JQuery 3.
Based on solid backend technology: Django.
Responsive UI: works well on phones/tablets/laptops/desktops.
If you host an instance of Pytition, you can guarantee your signatories that their informations won't leak to third parties.
It is Open Source and Free Software.

Multi-lingual UI with i18n: English, French, Italian, Occitan, Spanish.
You can pre-visualize petitions before publishing them.
Easy to use: petition content is typed-in via TinyMCE editors (like WordPress).
You can setup real SMTP account for the confirmation e-mail so that it is less likely considered as SPAM.
Supports Open Graph tags to provide description and image to allow nice cards to be shown when people post the petition link on social networks.
You can propose your signatories to subscribe to a newsletter/mailinglist (via HTTP GET/POST or EMAIL methods).
You can export signatures in CSV format.
Support for several organizations on the same Pytition instance v2.0
- Fine grain per-user per-organization permissions
Email retry support through the use of a mail queue middleware
Nice (multiple) permlink support for each petition
Optional share buttons

Those are external projects that are needed and used by Pytition, but included in Pytition source tree: