The "OP" Method is a 2x2 method designed for speedsolving
Start: Create a T shape on the bottom layer using 2 opposite colours, preferably white and yellow with the bar on the left, this is already done in most scrambles, and often is only 2-3 moves if not.
1. Use OBL to orient all of the corners at once.
2. Separate the colours from each other (intuitive) so that the 2 opposite colours make up U/D layers e.g. White on bottom Yellow on top.
Note: These algorithms work on L moves if you flip the letters.