Oncomini's Arcade/Sniper Reticle
This one has a really cool style to it. There are some extra odds and ends floating around not working correctly since 7.2, but they don't show up that often and if you like the design it's not that intrusive.
Move the 'gui' folder into your most recent res_mods\version# folder
Install files manually to res_mods\version#\gui\flash