A decentralized online petition system enables individuals or groups to create, sign, and share petitions without a central authority. Using blockchain technology, these systems ensure the integrity and transparency of the petition process by recording every signature or action on the blockchain, making alterations or deletions impossible. This provides a permanent, tamper-proof record of the petition's progress. Such systems allow users to bypass traditional intermediaries like government or social media platforms, fostering more democratic and transparent decision-making. This paper reviews research on petition systems, highlighting the shortcomings of existing systems such as lack of accountability, vulnerability to hacking, and security issues. The proposed blockchain-based implementation aims to overcome these challenges. Decentralized voting systems have garnered interest recently due to their potential to provide secure and transparent voting platforms without intermediaries, addressing issues like voter fraud, manipulation, and trust in the electoral process. We propose a decentralized voting system web application using blockchain technology to ensure the integrity and security of the voting process. This system aims to provide a transparent, decentralized decision-making process that counts every vote while eliminating the need for centralized authorities. The paper presents an overview of the system architecture, design considerations, and implementation details, along with the potential benefits and limitations. Finally, we discuss future research directions, examining the technical aspects of the application, including underlying algorithms and protocols. Our research aims to enhance the integrity and accessibility of democratic processes, improve security, and ensure fairness, transparency, and tamper-proofness.