Links to small projects in C++

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http://www.linuxquestions.org – Can any one point out links to some small projects w.r.t C++ ? Now when I say small projects, It doesn't mean building a calculator or matrix multiplication programs, nor does it mean building games, nor does it mean dealing with databases, What I actually want is to use to use the advanced features of C++ like: i.Templates ii. Nested friends iii.Virtual functions iv. Operator overloading (not merely +, -) but '[', '<<' also Yes, I have searched the LQ forums (threads) as well as Google, couldn't get anything much useful w.r.t my requirements !! Kindly guide ! (HowTos)