Acol (bidding majors before minor generally with 4-4), weak no trump,
Weak 2-bids in ¨,© and ª (over 2¨, 2NT asks for feature; over 2©/ª, it asks for shortage)

Stayman and Transfers
Baron 2NT over 1§/¨
Jacoby 2NT over 1©/ª
Roman Key Card Blackwood
Lebensohl
1NT rebid=15-17; 2NT rebid=18-19 Checkback (2§) over 1NT rebid

Weak jump overcalls (intermediate in 4th seat)
Cue-bids show support, jump raises are pre-emptive
Michaels cue-bids, Unusual No Trumps
Doubles generally for take-out NOT penalty
Fit-showing jumps