Presentations:
Dan & Charles - EarlyTemple
https://earlytemple.com
https://en.bitcoin.it/wiki/Contracts
https://www.youtube.com/watch?v=mD4L7xDNCmA

Max - BitDeliver
http://bitdeliver.to

Aaron - Crypto Currency Analytics Company
http://cryptocurrencyanalytics.com/

Majority is not Enough: Selfish Mining
http://arxiv.org/pdf/1311.0243v1.pdf
https://bitcointalk.org/index.php?topic=2227.msg30064#msg30064
https://bitcointalk.org/index.php?topic=325824.0;all
http://bitcoinmagazine.com/7953/selfish-mining-a-25-attack-against-the-bitcoin-network/

CoinSwap
https://bitcointalk.org/index.php?topic=321228.0

Extending the Payment Protocol with vCards
https://bitcointalk.org/index.php?topic=329229.0

P2Pool Upgrade Bounties
https://bitcointalk.org/index.php?topic=329860.0

High Speed Bitcoin Relay Network
http://article.gmane.org/gmane.comp.bitcoin.devel/3202/match=

Only DoS-ban on blocks that contain invalid proof-of-work
https://github.com/bitcoin/bitcoin/issues/3195

Information Propogation Delay in the Bitcoin Network
http://www.tik.ee.ethz.ch/file/49318d3f56c1d525aabf7fda78b23fc0/P2P2013_041.pdf

Have a Snack, Pay with Bitcoin (Fighting Double Spends)
http://www.tik.ee.ethz.ch/file/848064fa2e80f88a57aef43d7d5956c6/P2P2013_093.pdf

Implementing CoinJoin in QT?
https://github.com/bitcoin/bitcoin/issues/3226

Reducing Latency in Network Processing
https://github.com/bitcoin/bitcoin/pull/3180

OSX Maverik App Nap Slowdown
https://github.com/bitcoin/bitcoin/issues/3182

ZeroConf Replace for Fee
http://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg03126.html

Merge Mining
http://bitcoin.stackexchange.com/questions/273/how-does-merged-mining-work

Making Hot Wallets Hard to Steal
https://bitcointalk.org/index.php?topic=307211.0;topicseen

Tools:
Off-chain Anonymous Transactions by Secure Transfer of Private Keys
https://bitcointalk.org/index.php?topic=321085.0

Bitcoin OMG .8.5
https://bitcointalk.org/index.php?topic=320695

Raw Tx Tool in Java (Tread with CAUTION)
https://github.com/italiano40/RawTx-Tool

Blockchain.info CoinJoin Implementation in the wild
https://bitcointalk.org/index.php?topic=279249.msg3467698#msg3467698

Misc:
Shamir Secret Sharing
https://en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing

Fidelity Bonds
https://en.bitcoin.it/wiki/Fidelity_bonds

BIP 0032 HD Wallets
https://en.bitcoin.it/wiki/BIP_0032

Scripts
https://en.bitcoin.it/wiki/Script

NY Bitcoin Startups Meetup
http://www.meetup.com/NY-Bitcoin-Startups/events/149220062/

Search for Registered MSBs
http://www.fincen.gov/financial_institutions/msb/msbstateselector.html