Chache Killer (Automatically clears browser cache before loading a webpage):
https://chrome.google.com/webstore/detail/cache-killer/jpfbieopdmepaolggioebjmedmclkbap?hl=en
Colorpick Eyedropper (get Hex codes)
https://chrome.google.com/webstore/detail/colorpick-eyedropper/ohcpnigalekghcmgcdcenkpelffpdolg
Awesome Screenshot (take and share screen shots easily)
https://chrome.google.com/webstore/detail/awesome-screenshot-captur/alelhddbbhepgpmgidjdcjakblofbmce
Last Pass (Password management)
https://lastpass.com/
Zen Mate (Browser VPN)
https://chrome.google.com/webstore/detail/zenmate/fdcgdnkidjaadafnichfpabhfomcebme?hl=en
AdBlock
https://chrome.google.com/webstore/detail/adblock/gighmmpiobklfepjocnamgkkbiglidom?hl=en