clear cache — https://chrome.google.com/webstore/detail/clear-cache/cppjkneekbjaeellbfkmgnhonkkjfpdn
color select — https://chrome.google.com/webstore/detail/eye-dropper/hmdcmlfkchdmnmnmheododdhjedfccka
PerfectPixel — https://chrome.google.com/webstore/detail/perfectpixel-by-welldonec/dkaagdgjmgdmbnecmcefdhjekcoceebi
Resolution Test — https://chrome.google.com/webstore/detail/resolution-test/idhfcdbheobinplaamokffboaccidbal
Screen ruler — https://chrome.google.com/webstore/detail/ruul-screen-ruler/mlbnpnlmfngmlcmkhjpbfokdphfehhjj
Save CSS — https://chrome.google.com/webstore/detail/save-css/mflkegihknjnhmpfnaimpfkjbkelhhkf
Advanced Screen ruler — https://chrome.google.com/webstore/detail/jmfleijdbicilompnnombcbkcgidbefb
Yandex TYC + Google PR indicator — https://chrome.google.com/webstore/detail/npnpocgajlfmoaaaglofcoedjpcilale
Захват экрана — https://chrome.google.com/webstore/detail/cpngackimfmofbokmjmljamhdncknpmg
W3C (x)HTML Validator — https://chrome.google.com/webstore/detail/fdicklfajomdgpciofajkedchajbnhkk