Elastic Block Caps - Meni Rosenfeld (Israeli Bitcoin Association) Meni Rosenfeld

Improving routing in the Lightning Network with Trampoline Payments - Bastien Teinturier (Acinq) ACINQ

PISA: Arbitration Outsourcing for State Channels - Patrick McCorry (PISA Research) @paddypisa

Outpost: A Responsive Lightweight Watchtower - Tejaswi Nadahalli (ETH Zurich)

Açai: a backup protocol for Lightning Network wallets - Margherita Favaretto

Rainbow Network: Synthetic Assets on Lightning - Dan Robinson (Paradigm)

Atomic Multi-Channel Updates with Constant Collateral in Bitcoin-Compatible Payment-Channel Networks - Pedro Moreno-Sanchez (Vienna University of Technology) Pedro Moreno-Sanchez

Plasma Cash: Towards more efficient Plasma Constructions - Georgios Konstantopoulos Georgios Konstantopoulos

A2L: Anonymous Atomic Locks for Scalability and Interoperability in Payment Channel Hubs - Pedro Moreno-Sanchez

Recovering Payment Channel Midstates Using only The User's Seed - David Vorick Nebulous

Proof of Necessary Work: Succinct State Verification with Fairness Guarantees - Assimakis Kattis (NYU) Joseph Bonneau

SeF: A Secure Fountain Architecture for Slashing Storage Costs of Blockchains - Swanand Kadhe (University of California, Berkeley)

Optical Proof of Work - Mikael Dubrovsky

A Lucas Critique to the Difficulty Adjustment Algorithm of the Bitcoin System - Yoshinori Hashimoto (BUIDL, Ltd)

Offline Transactions (inspired by Blockchain Ethics) - Daniel Marquez (MIT Media Lab)

Conditional Transfer of Tokens on Top of Bitcoin - Thomas Eizinger

Storm: layer 2/3 storage & messaging - Maxim Orlovsky (Pandora Core)

Building Ultra-light Clients with SNARKs - Noah Vesely (C-Labs)

Signet - Karl-Johan Alm (DG Lab) Kalle Alm DG Lab

Miniscripts - Andrew Poelstra Blockstream