Articles that I've taken to GA status or significantly contributed to improving:

• en.wikipedia.org/wiki/Binary_search_tree
• en.wikipedia.org/wiki/Trie
• en.wikipedia.org/wiki/Fast_flux
• en.wikipedia.org/wiki/Bulletproof_hosting
• en.wikipedia.org/wiki/Consistent_hashing
• en.wikipedia.org/wiki/LSD
• en.wikipedia.org/wiki/25-NB