Recently came across Zerodha and had to set it up for a friend. Really good UX, and they've done a good job maintaining with the rapid tech progression. Also,

Recently came across Zerodha and had to set it up for a friend. Really good UX, and they've done a good job maintaining with the rapid tech progression. Also, thanks for the ERPNext.org suggestion - sometimes I wonder how many open source gems I have yet to see. (No, please don't link me to one more awesome-X list :P)