Favorite Gimp plugins and scripts
Auto rotate with a vector You first create a vector with the path tool then this plugin will rotate the image to line up with the path.
Exact Aligner This script aligns two layers. You specify a path on one layer, then a similar path on another layer. This script will bring the two paths into alignment.
Wavelet denoise Very impressive noise filtering.
Wavelet sharpen Very impressive low frequency filtering.
script-fu-make-anaglyph Create 3D Stereo anaglyphs.