I have made a few small project to support effors that many of my customers work with every day, from the Frejalogin minimalistic SAML2.0 Identity Provider for use with Office 365 written in Node that will let you use LOA3 level identities from Freja eID (and its support library eid-provider which interacts with Freja eID, BankID, Svensk e-Legitimation, Funktionstjänster and more) to phpFreja which is a simple integration for PHP to Freja eID. Simple PHP wrapper to talk to Freja eID REST API.

Frejalogin (NodeJS)
https://github.com/DSorlov/frejalogin

eid-provider (NodeJS)
https://github.com/DSorlov/eid-provider
https://www.npmjs.com/package/eid-provider

phpFreja (PHP)
https://github.com/DSorlov/phpFreja