Down Underflow 2026
The FOSSi Foundation is proud to announce the inaugural installment of Down Underflow, a conference dedicated to free and open source silicon to be held in the southern hemisphere over the weekend of Saturday February 28 and Sunday March 1st, 2026 in Sydney, Australia.
Down Underflow is a weekend of presentations and networking for the open source silicon community. Browse through previous installments of FOSSi Foundation events, the shape of which Down Underflow will take, here.
Questions? Ping the organizers via email at downunderflow@fossi-foundation.org.
Register
Down Underflow is free to attend.
If you are able to, please considering assisting with the costs of the event via a "Pay what you want" ticket with an donation. If you are attending Down Underflow on behalf of your company, you are encouraged to donate with a professional ticket. Please choose one option in the checkout process -- you do not need a "Free" ticket in addition to a "Pay what you want" ticket.
Submit a talk
Presentations are submitted through the Eventbrite registration interface.
Code of conduct
We expect all Down Underflow participants to adhere to the the FOSSi Foundation code of conduct throughout the event.
Let's talk!
Join the #downunderflow2026:fossi-foundation.org Matrix room to chat with other participants at the conference, share additional information about the talks, about traveling to and from Sydney, and what else comes to your mind!
Venue
Down Underflow 2026 will be held in Sydney, Australia at a venue close to the city which is to be confirmed closed to the time. The venue will be close by Sydney's Central Station, so arrange accommodation which will be convenient to there.
Social event
Saturday evening after the talks at the conference venue have finished we will put on drinks and a dinner for the conference attendees. Venue details TBD.
Supporters
We thank all our sponsors, exhibitors, and all participants who donated by buying a Pay-what-you-want or Professional Ticket.
Down Underflow is free to attend, but we aim to provide catering and the like during the event. Down Underflow is also a great way to get your company or brand in front of lots of engineers and hackers on the day, and thousands more through recordings of the event.
A variety of sponsorship packages are available for this year's Down Underflow. You'll find all of the details in our sponsorship prospectus.
Please get in touch at downunderflow@fossi-foundation.org if you'd like to explore sponsorship opportunities.
A variety of sponsorship packages are available for this year's Down Underflow.
Down Underflow is organized by volunteers on behalf of the FOSSi Foundation. We are currently looking for more people to help out with arrangements and putting on the event, so please do email us if you would like to volunteer for during the event with setup, AV, or even just local knowledge so we can plan the weekend better.
Schedule
Saturday, Feb 28: Conference, lightning talks, and social event
Schedule to be posted when talk submissions have been received.
Sunday, March 1: Unconference and workshops
On Sunday March 1st, should there be sufficient interest, we can make available spaces for folks to meet and discuss projects of interest and even hold workshops.
Ideas for other unconference and workshops?
For example, at previous FOSSi Foundation evnets we've had fantastic sessions on
- cocotb
- Amaranth
- Open Source DFT and in-field debug
- Clash and Haskell
- Surfer
What deep-dives will we have at Down Underflow? It's up to all of us!
Feel free to submit your ideas ahead of Down Underflow or propose them throughout the conference.
Talks
TBD