The Daily Index — Monday, June 29, 2026 · TLDR Index

Repositories, courses and useful tools

Resources & Tools

TLDR Dev · GitHub repository

TEXTBEE

TextBee is an open-source SMS gateway that allows users to send and receive SMS messages through a web dashboard or REST API, using their own Android devices for messaging capabilities.

github.com

TLDR Dev · GitHub repository

OPENPENCIL

OpenPencil is an open-source, AI-native vector design tool that allows users to create UI designs from natural language prompts, using concurrent agent teams and code export capabilities across multiple frameworks.

github.com

TLDR Dev · Tool

FINTECH ENGINEERING HANDBOOK

The Fintech Engineering Handbook outlines essential software engineering principles and patterns for building trustworthy financial systems that accurately handle money through rigorous data integrity, clear tracking of transactions, and proper interaction with external services.

w.pitula.me

TLDR Dev · GitHub repository

12 FACTOR AGENTS

The 12-factor agents framework outlines principles for building reliable software powered by LLMs, focusing on the integration of modular concepts and effective engineering techniques to improve the quality and scalability of AI applications for production use.

github.com

TLDR Design · Tool

SHADER LAB

A powerful toolkit to create, stack, and animate shaders. Add your first keyframe from the properties panel.

eng.basement.studio

TLDR Design · Tool

AI THUMBNAIL MAKER FOR YOUTUBE

Generate studio-quality YouTube and Shorts thumbnails that stop scrolling and drive clicks in seconds.

thumbmagic.co

TLDR Design · Tool

AI-GENERATED VIDEO CREATION PLATFORM

Generate polished, multilingual avatar videos from scripts, briefs, decks, or documents.

d-id.com

TLDR Founders · GitHub repository

OPENTAG

OpenTag enables users to run AI agents inside Slack. It is like having Claude in the workspace, except open-source and self-hosted. OpenTag is built on CopilotKit's open SDK for chat-platform agents. A video of the tool in action is available in the repository.

github.com