twstools is a simple set of command line tools around the Interactive Brokers TWS API with the purpose of having a powerful scriptable toolbox to automate "jobs" like downloading historical data, tracking account info or submitting orders, etc.
twsapi is a portable C++ API for Interactive Brokers TWS. It is almost identical to the original IB C++ Posix API. It contains several bugfixes and usage improvements, and uses the autotools build system.
tcsv2png uses gnuplot to convert a CSV file with a time column (HH:MM:SS format) into a PNG chart. It scales the data to show all of the data sets in the same PNG chart. You can select the columns of interest. You can customize the generated gnuplot script to your need.