1. Unix and Unix-based operating systems
2. dwm (window manager)
3. GNU Octave (similar to MATLAB)
4. Gnumeric (open source spreadsheet editor, compatible with excel)
5. ghdl (open source VHDL compiler)
6. gtkwave (open source .vcd viewer)
7. Temple OS
8.
1. Intel Quartus
2. Windows
3. MS Word
4. GNOME
5. LTspice
6. Intel Quartus
7. Rust
8. JS
9. Ruby
10. Java