Butterfly is an open-source, cross-platform note-taking app built around an endless workspace for placing notes, sketches, diagrams, images and documents. It supports handwriting, typed text and Markdown, shapes and lines, and imports of PDFs, SVGs and image files. Content can be exported as PDF, SVG, images or portable Butterfly files. Files can be stored locally, and the app works offline.
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Deep learning in Rust, with shape checked tensors and neural networks.
S2 is a Go library for spherical geometry. It provides representations of angles, intervals, latitude-longitude points and unit vectors, geometric shapes over the unit sphere such as caps, rectangles, polylines and polygons, a hierarchical cell decomposition, constructive operations and predicates, in-memory indexing, distance algorithms and snapping and simplification. Planar geometry and conversions to common GIS formats are outside its scope.
NDScala is a Scala 3 library for N-dimensional and multi-dimensional arrays (tensors), described as comparable to NumPy ndarray or PyTorch Tensor, with type safety over shapes, array and axis labels and numeric data types. The repository includes materials on shape-safe neural network training and an ONNXScala component.
SVGo is a Go language library for SVG generation. It supports common SVG elements including shapes, lines, text, paths, images, and gradients, and is hosted as an open-source project on GitHub.
TensorFlow Fold is a library for creating TensorFlow models that consume structured data, where the computation graph depends on the structure of the input data. It implements dynamic batching, transforming batches of arbitrarily shaped computation graphs into a static computation graph. TensorFlow Fold is not an official Google product.
Xournal++ is a handwriting notetaking program with PDF annotation support, written in C++ with GTK3. It runs on Linux, macOS and Windows 10 and supports pen input from devices such as Wacom tablets. The project offers paper backgrounds, drawing tools and shape drawing, and can follow links from a background PDF.