Overleaf, TeXstudio, LyX, Gummi, WinEdt, Texmaker, Kile, TexitEasy, Bakoma Tex, TeXpert, VerbTeX LaTeX Editor, SwiftLaTeX, TexMaths, Latexian, Authorea, Verbosus: Online LaTeX Editor, TeXPortal, VimTeX, TeXworks, ScribTeX, LaTexLab, LaTeXing, Vim-LaTeX, Latexila, IT-Edit, JLatexEditor, Inlage, WinShell are some alternatives to TeXnicCenter.