There are many open source tools available for VLSI design projects. Some of the most popular tools include:

GHDL is a free and open source hardware description language (HDL) simulator. It can be used to simulate Verilog and SystemVerilog HDL designs.

Yosys is a free and open source HDL synthesis tool. It can be used to synthesize Verilog and SystemVerilog HDL designs into gate-level netlists.

Icarus Verilog is a free and open source Verilog simulator. It can be used to simulate Verilog HDL designs.

XSpice is a free and open source SPICE simulator. It can be used to simulate analog and mixed-signal circuits.

Magic is a free and open source IC layout editor. It can be used to create the physical layout of an integrated circuit.

Gschem is a schematic capture tool that is used to create the logical design of a chip. It is a simple tool that is easy to learn and use.

Qflow is a design flow that automates the process of designing a chip. It is a powerful tool that can be used to design chips quickly and efficiently.
These are just a few of the many open source tools available for VLSI design projects. With a little research, you can find the tools that are right for your needs.
In addition to these tools, there are many other resources available to help you with your VLSI design projects. Here are a few websites that you may find helpful:

Open Circuit Design is a website that provides information and resources for open source VLSI design tools.

VLSI System Design is a website that provides tutorials and resources for VLSI design using open source tools.

EDA Playground is a website that provides a free online environment for experimenting with VLSI design tools.

Odin is an online simulator that can be used to simulate VLSI designs written in Verilog or SystemVerilog. It is a simple tool that is easy to learn and use.
Odin VLSI design simulation tool

Verilog-XL is an open source simulator that can be used to simulate VLSI designs written in Verilog. It is a powerful tool that can be used to simulate complex designs.
Verilog-XL VLSI design simulation tool

SystemVerilog-XL is an open source simulator that can be used to simulate VLSI designs written in SystemVerilog. It is a powerful tool that can be used to simulate complex designs.
SystemVerilog-XL VLSI design simulation tool
There are many online resources available to get VLSI design projects from vendors like Synopsys, Cadence, Mentor Graphics, Infineon, STMicroelectronics, Intel, and Xilinx. Some of the most popular resources include:
Synopsys Design Challenge is a yearly competition where students can design a chip using Synopsys tools. The competition is open to students from all over the world.
Cadence Design Contest is a yearly competition where students can design a chip using Cadence tools. The competition is open to students from all over the world.
Mentor Graphics Design Challenge is a yearly competition where students can design a chip using Mentor Graphics tools. The competition is open to students from all over the world.
Infineon Design Contest is a yearly competition where students can design a chip using Infineon tools. The competition is open to students from all over the world.
STMicroelectronics Design Contest is a yearly competition where students can design a chip using STMicroelectronics tools. The competition is open to students from all over the world.
Intel Design Contest is a yearly competition where students can design a chip using Intel tools. The competition is open to students from all over the world.
Xilinx Design Contest is a yearly competition where students can design a chip using Xilinx tools. The competition is open to students from all over the world.
In addition to the competitions listed above, there are many other resources available to help students find VLSI design projects. Some of the most popular resources include:

IEEE Spectrum is a magazine that publishes articles about VLSI design. The magazine also has a website that contains articles, news, and events related to VLSI design.

EE Times is a magazine that publishes articles about electronics design. The magazine also has a website that contains articles, news, and events related to VLSI design.

VLSI Design is a magazine that publishes articles about VLSI design. The magazine also has a website that contains articles, news, and events related to VLSI design.

VLSI Design Conference is a yearly conference that is held to discuss the latest advances in VLSI design. The conference is open to engineers, scientists, and students from all over the world.

International Conference on Computer-Aided Design (ICCAD) is a yearly conference that is held to discuss the latest advances in computer-aided design (CAD) for VLSI design. The conference is open to engineers, scientists, and students from all over the world.
International Conference on Computer-Aided Design (ICCAD)

Design Automation Conference (DAC) is a yearly conference that is held to discuss the latest advances in design automation for VLSI design. The conference is open to engineers, scientists, and students from all over the world.
Design Automation Conference (DAC)
These are just a few of the many resources available to help students find VLSI design projects. With a little effort, students can find projects that are both challenging and rewarding.
With the help of these tools and resources, you can start working on your own VLSI design projects today.