I can provide information about some popular and widely-used fonts that were popular in 2021:

1. Arial: Arial is a sans-serif font that is widely used on computers and other electronic devices. It was designed in 1982 and has since become one of the most widely-used fonts in the world. Arial is known for its clean, modern design and strong readability, making it well-suited for use in a wide range of applications.
2. Calibri: Calibri is a sans-serif font that was designed in 2004 and has since become one of the most popular fonts for use on computers and other electronic devices. It is known for its clean, modern design and strong readability, and is often used for professional and business documents such as resumes, presentations, and reports.
3. Cambria: Cambria is a serif font that was designed in 2004 and is known for its clean, modern design and strong readability. It is often used for professional and academic documents, such as research papers and academic articles, as well as for business documents such as reports and presentations.
4. Century Gothic: Century Gothic is a sans-serif font that is known for its clean, modern design and strong readability. It is often used for professional and business documents, such as resumes, presentations, and reports.
5. Comic Sans: Comic Sans is a sans-serif font that is known for its playful, informal design. It is often used for children’s materials and other projects that are intended to have a fun, lighthearted feel.
6. Helvetica: Helvetica is a sans-serif font that is known for its clean, modern design and strong readability. It is often used for professional and business documents, such as resumes, presentations, and reports.
7. Times New Roman: Times New Roman is a serif font that is known for its traditional, formal design. It is often used for academic and professional documents, such as research papers and business reports.
8. Verdana: Verdana is a sans-serif font that is known for its clean, modern design and strong readability. It is often used for professional and business documents, such as resumes, presentations, and reports.
9. Georgia: Georgia is a serif font that is known for its clean, modern design and strong readability. It is often used for professional and academic documents, such as research papers and academic articles.
10. Palatino: Palatino is a serif font that is known for its clean, modern design and strong readability. It is often used for professional and academic documents, such as research papers and academic articles.

Great selection of free fonts: the best of the best