Maybe https://radicale.org/ could fit the bill, CalDav for as a calendar server and CardDav for contacts. - Source: Hacker News / 11 months ago

I now use CalDAV Synchronizer to sync Outlook to my Radicale CalDAV / CardDAV "server" (a Raspberry Pi), with DAVx running on our phones. Source: about 1 year ago

Setup: 1. Install a CalDev server on my home server (running Debian Linux) using maybe Radicale (https://radicale.org/) 2. Use the Linux version of ProtonMail Bridge on this server to set up IMAP to connect to this CalDev server 3. Configure filters to automatically forward event invites sent to my ProtonMail address to my CalDev server, decrypted by Bridge 4. Configure my CalDev server to use ProtonMail to send... Source: over 1 year ago

Caldav is what you are looking for. The other comments mention implementations of them and I can vouch for radicale pretty barebones but does its job. Source: over 1 year ago

We are thinking of writing a guide to setting up a small Radicale instance. This could be hosted on a raspberry pi, or small NAS or something. Source: over 1 year ago

This sub is not about TOR and all the seediness that goes on there but rather about creating darknets, by which we/they mean mesh networks and encrypted networks using tools like https://github.com/cjdelisle/cjdns/. Source: 11 months ago

One of my favorite projects in IPv6 space is the CJDNS project: LINK TO GITHUB. Source: about 1 year ago

From a purely networking perspective, there are far better solutions than tailscale. Have a look at full mesh VPNs like: https://github.com/cjdelisle/cjdns https://github.com/yggdrasil-network/yggdrasil-go https://github.com/gsliepen/tinc https://github.com/costela/wesher These build actual mesh networks where every node is equal and can serve as a router for other nodes to resolve difficult network topologies... - Source: Hacker News / over 1 year ago

I'm excited about P2P/decentralized/distributed overlay networks. Still catching up so would be grateful for tips on resources. Pinecone[0][1], newer initiative made by former Yggdrasil[2] maker(s). CJDNS[3]. AIUI CJDNS relies on intermediary high-uptime discoverable router nodes which is what is motivating Pinecone. POKT[4][5] to CJDNS seems like what Filecoin is to IPFS. I'm yet to get around to doing the... - Source: Hacker News / almost 2 years ago

>There's not some program you can "donate" bandwidth to and make money off of it. There is one: https://pkt.cash/ from the maker of https://github.com/cjdelisle/cjdns. - Source: Hacker News / over 2 years ago