Self-hosted applications

Bookmark managers

Shaarli : PHP

Personal, minimalist, super-fast, database free, bookmarking service

Calendars & Contacts

DAViCal : PHP

Server for calendar sharing

Radicale : Python

Simple calendar and contact server

sabre/dav : PHP

Most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers

Xandikos : Python

Lightweight yet complete CardDAV/CalDAV server that backs onto a Git repository

Development platforms

GitLab FOSS : Node.js/Ruby

Open source end-to-end software development platform with built-in version control, issue tracking, code review, CI/CD, and more

Gitea : Go

Git with a cup of tea, painless self-hosted Git service

sourcehut : Python

Open source software suite for managing your software development projects

Email

Clients

Mailpile : Python

Free & open modern, fast email client with user-friendly encryption and privacy features

Roundcube : PHP

Browser-based multilingual IMAP client with an application-like user interface

Servers

Dovecot : C : retrieve

Open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind

OpenSMTPD : C : transfer

FREE implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extension

Feed readers

Feedbin : Ruby

RSS reader with a beautiful reading experience

FreshRSS : PHP

Free, self-hostable aggregator

Miniflux : Go

Minimalist and opinionated feed reader

selfoss : PHP

Multipurpose RSS reader, live stream, mashup, aggregation web application

Tiny Tiny RSS : PHP

Open source web-based news feed (RSS/Atom) reader and aggregator

Reference: https://www.devolve.net/self-hosted-open-source-rss-readers/

Read later

wallabag : PHP

Self hostable application for saving web pages

Wikis

DokuWiki : PHP

Simple to use and highly versatile Open Source wiki software that doesn’t require a database

gitit : Haskell

Wiki using HAppS, pandoc, and Git

Gollum : Ruby

Simple, Git-powered wiki with a sweet API and local frontend

MediaWiki : PHP

Free software open source wiki package written in PHP, originally for use on Wikipedia

Wiki.js : Node.js

Modern, lightweight and powerful wiki app built on NodeJS, Git and Markdown

Note

Another option would be to pair a static site generator with a development platform. This wiki uses Sphinx and GitLab, see its .gitlab-ci.yml file.

See also