Note that the highlighted events are the ones that i personally consider the hot ones.

1st of June

• Eos: erc-20 tokens will be freezed and converted into real EOS tokens on EOS blockchain

• SYS coin: holders airdrop(CPS coin).

• Pundi X: 7% of tokens unlocked - prolly negative

• Vertcoin(VTC): Vertbase Launch(buy/sell VTC with USD)

• shift: atomic swap between chains enabled

• aphelion(APH): mobile wallet

• GameCretdits(Game): HD wallets, eventual segwit signaling and atomic swaps activation

• Authorship(ATS): official project launch
• DigiPulse(DGPT): main service release
• Billionaire Token(XBL): migration to EOS
• PACcoin(PAC): business plan finalised
• Flash Token(FTOKEN): payment of the first dividends
• Iot Chain(ITC): 12.65M ITC tokens added to circulating supply

3rd of June

• IOTA: more information about their new project "Qubic"
• Banyan Network(BBN): ICO tokens released

4th of June

• OriginTrail(TRAC): explorer release v0.9a(privacy layer implementation)
• FORCE(FOR): new website and roadmap
• Aerium(AERM): token swap, new whitepaper and roadmap

6th of June

• Cardano(ADA): roadmap update
• Zoin(ZOI): snapshot for NIX airdrop
• Waves(WAVES): Waves summer road show
• Factom(FCT): factom community AMA

7th of June

• bitShares(BTS): core realease(Hard fork) and major updates

• Storm(STORM): an airdrop of unsold tokens
• Lisk(LSK): miami meetup