My biggest project so far is Metta - a humane, social and multimedia OS. While multimedia and social are pretty much all over the place, humane part is still unexplored widely.
Bits and pieces are appearing in different systems from different vendors, but they still haven't integrated enough.
This is a huge undertaking and given that neither Apple nor Microsoft is near achieving it yet, chances are I won't make it alone either. But I have to try anyway.
One side - the low-level platform, which supports secure, distributed, federated, peer-to-peer systems - is being developed at metta. It supports an entirely different programming paradigm of component-based composable system, where interfaces between components make it possible to remote parts of the system without ever changing the application itself; and introspection facilities allow to build mashable applications out of existing components without ever needing anything else. A fast, portable, peer-to-peer foundation platform.
Another side - the user-space interaction and social facilities - developed at mettanode. MettaNode is a tool for fully decentralized communications - grab data you like and store it forever, share data with your friends, start chats, voice or video calls, form groups by interest, transparently keep all your notes between all of your devices; all based on a simple ideas of UIA. It is still in its infancy and only base transport protocol is done, work is now going on on overlay routing network. This project is no less ambitious, but better progress is being made here, since it is a simple application ran on regular off-the-shelf operating systems.
The grabber comes from Latin saying "Omnia mea mecum porto" - grab, snapshot things I need and forever keep them available to me. This is one of the current research topics in the humane part. How much data do I need? Where do I need it? How my life changes if I always can find what I need, wherever I am?
Final target is to have a bunch of clients for desktop and mobile platforms (Win, Mac, Linux, Android, iOS) as well as own operating system implementation (Metta) running together.
There are building blocks in form of underlying substrate libraries (libsupport for miscellaneous utilities, libkrypto for cryptographics primitives, libssu for encrypted multiplexed re-routable streams, librouting for routing those streams regardless of peers locations and availability). They could also be used separately to support your applications.
There's a new website with more fundamental articles on Metta-related matters.
Ping @berkus if you have any questions or ideas.