Not very specific, so take your pick...
In order of current capacity, high speed junction / schottky types.
BAT54 (A, C, S suffixes) (SOT-23, SOD-323, etc.)
BAV99 (~dual 4148, SOT-23)
MMSD4148W (and other prefixes for various sizes: SOD-123, 323, MELF, etc.)
MBR0540 (SOD-123, etc.)
MBR160 / B160 (anything from 130-1100 for different breakdown voltages; SMA)
ES1B (and other suffixes for different voltages; SMA)
B340 (SMB)
ES3B (SMC)
B540 (SMC)
and so on. Bigger devices are available in D[2]PAK and such but really, by the time you're over 5A schottky / 3A junction, you need a heatsink.
Tim