Develop a program using the pytube library to download YouTube videos locally by providing a URL or keyword. Utilize the os module for file and directory management.
Develop a program using the sqlite3 module to create and manage contacts, including names, phone numbers, and email addresses. Implement a graphical user interface (GUI) with the tkinter library.
Build a program employing the nltk library for natural language processing and markovify library to generate random stories based on specified genres, themes, or prompts.
Develop a program utilizing the time module for time-related functions and the pygame library to showcase a countdown clock or timer with graphical display and sound effects.
Develop a program employing the PIL library for image manipulation and the bitstring module for binary conversion to hide and reveal secret messages or data within images.
Develop a program using the difflib module to compare text sequences and the textdistance library to calculate similarity metrics, identifying plagiarism or similarity between two texts.
Develop a program utilizing the pandas library for managing expenses, handling income, bills, savings, etc. Integrate matplotlib for creating charts and graphs.