Strong to weak

• ake 'ache', ook, aken
• bake, book, baken
• chide, chid (with vowel from plural for expected 'chode'), chidden
• cleave, clove, cloven (also clave, cleft)
• creep, crope, cropen
• crow, crew, crown
• glide, glode (also glad), glidden
• help, halp, holpen
• laugh, low, laughen
• lose, lose (to rhyme with rose), losen (but weak from OE)
• melt, molt, molten
• mow, mew, mown
• shape, shope, shapen
• win, wan, wun (why not won?)
• writhe, wrothe, writhen

Some remarkable cases

• catch < Fr. cacher 'hide' (caught by analogy to reach, raught; teach, taught)
• dig < Fr. diguer < Fr. digue 'dike' < Gmc. root for 'dike' (dug by analogy to stuck)
• strive < Fr. estriver 'contend' (assimilated to Class 1, write)