> For the complete documentation index, see [llms.txt](https://docs.aboutcircles.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aboutcircles.com/developer-support/past-hackathon-projects-on-circles.md).

# Past Hackathon Projects on Circles

Here are some of the past hackathon projects built with Circles. You can use these as a reference or to get inspiration of what kind of applications to build.

### 1. EthGlobal Brussels 2024

BraceBuddy allows to onboard easily and in a fun way people to the Circles ecosystem with NFC!

{% embed url="<https://ethglobal.com/showcase/bracebuddy-ph10y>" %}
First Prize
{% endembed %}

Woleth is an easy to use EVM wallet embed into Telegram designed to build a Social Graph utilizing Circle's invite mechanism.

{% embed url="<https://ethglobal.com/showcase/woleth-eth-3ukpz>" %}
Runner Up
{% endembed %}

Famjam is a dapp that uses Circles to create a family currency to incentivize kids for good behaviour.

{% embed url="<https://ethglobal.com/showcase/famjam-99inm>" %}
Runner Up
{% endembed %}

### 2. EthGlobal Singapore 2024

Voting with UBI is a dapp which implements a voting mechanism for DAOs by utilizing Circles group tokens.

{% embed url="<https://ethglobal.com/showcase/voting-with-ubi-k56uu>" %}

### 3. EthGlobal Prague 2025

Circles Subscriptz allows users to securely, trustlessly & smoothly authorize recurring payments.

{% embed url="<https://ethglobal.com/showcase/circles-subscriptz-tgfhj>" %}
Winner of Blockscout Explorer Pool Prize
{% endembed %}