BLHeli

An open-source library for accelerating large language model (LLM) fine-tuning, significantly reducing VRAM usage and increasing training speed.

OpenBB is an open financial data platform for analysts, quants, and AI agents, aggregating equities, options, crypto, and macro data from multiple sources behind one Python library and REST API — connect once, consume everywhere.

Pathway is a Python ETL framework that unifies batch and streaming data for stream processing, real-time analytics, LLM pipelines, and RAG, powered by a Rust engine based on Differential Dataflow.

Requests is a simple yet elegant Python HTTP library for sending HTTP/1.1 requests with minimal code, handling query strings, form encoding, cookies, auth, and decompression automatically.

LlamaIndex is an open-source data framework for LLM applications (Python). It provides data connectors, indices, query engines, and agent orchestration to feed private data into LLMs for building RAG and agent apps.

pandas is the most popular Python data analysis and manipulation library, providing labeled data structures (Series and DataFrame) similar to R's data.frame, covering cleaning, alignment, group-by aggregation, and time series for everyday data work.