@DarthCoin posted about Floresta earlier this month (#1424832). Here is a desktop wallet that uses Floresta as its node. It's a work in progress, so definitely don't use it with funds you aren't willing to risk.

Bonsai is built as a showcase of bdk_floresta, a novel chain-source crate for BDK, which embeds Floresta, an extremely lightweight full-node implementation that leverages Utreexo to keep a compact representation of the UTXO set in under 2KB, and a small memory footprint. It allows wallet synching with zero requests to untrusted third-party APIs. The vast majority of wallets rely on third-party indexing servers (e.g. Esplora and Electrum protocols), which represent a huge privacy leak for users due to IP address and Bitcoin address correlation. Removing this security hole is a must for sovereign Bitcoin usage.

This application aims to show to developers the full set of capablities that bdk_floresta allows for building wallet applications with a nice and sleek user interface.

Note:
Bonsai, bdk_floresta, and Floresta are still a work in progress, meaning that functionality is limited. Bonsai will be updated accordingly.

Wallets with built-in nodes are very cool!