This is the GNU Objective-C compiler, which compiles Objective-C on platforms supported by the gcc compiler. It uses the gcc backend to generate optimized code.

A wide range of problems in robotics as well as in computer-vision involve the minimization of a non-linear error function that can be represented as a graph. Typical instances are simultaneous localization and mapping (SLAM) or bundle adjustment (BA). The overall goal in these problems is to find the configuration of parameters or state variables that maximally explain a set of measurements affected by Gaussian noise. g2o is an open-source C++ framework for such nonlinear least squares problems. g2o has been designed to be easily extensible to a wide range of problems and a new problem typically can be specified in a few lines of code. The current implementation provides solutions to several variants of SLAM and BA. g2o offers a performance comparable to implementations of state-of-the-art approaches for the specific problems (02/2011)

This is the GNU Modula-2 compiler, which compiles Modula-2 on platforms supported by gcc. It uses the gcc backend to generate optimised code.

asyncmy is a fast asyncio MySQL/MariaDB driver, which reuse most of pymysql and aiomysql but rewrite core protocol with cython to speedup.

This is a class library and widget toolkit with full mouse support for creating a text-based user interface. The library supports the programmer to develop an application for the text console. It allows the simultaneous handling of multiple windows on the screen.

fwupd is a daemon to allow session software to update device firmware. You can either use a GUI software manager like GNOME Software to view and apply updates, the command-line tool or the system D-Bus interface directly. Firmware updates are supported for a variety of technologies. See <https://github.com/fwupd/fwupd> for details