Topic Serbo-Croatian Advanced Keyboard

I was looking at the index page of a message board dedicated to Serbian grammar and orthography, and on top of it, to make it easier for members to use various symbols, it displays the following plethora of useful ones:

◌̀ ◌́ ◌̂ ◌̃ ◌̄ ◌̆ ◌̇ ◌̈ ◌̉ ◌̊ ◌̋ ◌̌ ◌̍ ◌̎ ◌̏ ◌̑ ◌̓ ◌̔ ◌̾ ◌̥ ◌̱ ◌̪ ◌̞ ◌̝ ◌̣
ѣ Ѣ ь Ь ъ Ъ ѧ Ѧ ѫ Ѫ ѩ Ѩ ѭ Ѭ ѵ Ѵ ѓ Ѓ ќ Ќ ѕ Ѕ ё Ё й Й щ Щ ы Ы э Э ю Ю я Я ґ Ґ ї Ї і І ў Ў
α Α β Β γ Γ δ Δ ε Ε ζ Ζ η Η θ Θ ι Ι κ Κ λ Λ μ Μ ν Ν ξ Ξ ο Ο π Π ρ Ρ σ ς Σ τ Τ υ Υ φ Φ χ Χ ψ Ψ ω Ω ά Ά έ Έ ή Ή ί Ί ό Ό ύ Ύ ώ Ώ
ß ä Ä ë Ë ö Ö ü Ü å Å œ Œ æ Æ ø Ø þ Þ ă Ă ș Ș ț Ț ã à õ Õ ñ Ñ ç Ç ş Ş ğ Ğ ı İ č Č ć Ć š Š ž Ž đ Đ ð Ð ě Ě ę Ę ǫ Ǫ ś Ś ź Ź ł Ł ń Ń ż Ż ą Ą ď Ď ť Ť ľ Ľ ř Ř ů Ů ĺ Ĺ
а́ а̀ а̑ а̏ а̄ а̂ е́ ѐ е̑ е̏ е̄ е̂ и́ ѝ и̑ и̏ ӣ и̂ о́ о̀ о̑ о̏ о̄ о̂ у́ у̀ у̑ у̏ ӯ у̂ р́ р̀ р̑ р̏ р̄ р̂ А́ А̀ А̑ А̏ А̂ Е́ Ѐ Е̑ Е̏ Е̂ И́ Ѝ И̑ И̏ И̂ О́ О̀ О̑ О̏ О̂ У́ У̀ У̑ У̏ У̂ Р́ Р̀ Р̑ Р̏ Р̂
á à ȃ ȁ ā â é è ȇ ȅ ē ê í ì ȋ ȉ ī î ó ò ȏ ȍ ō ô ú ù ȗ ȕ ū û ŕ r̀ ȓ ȑ r̄ r̂ Á À Ȃ Ȁ Â É È Ȇ Ȅ Ê Í Ì Ȋ Ȉ Î Ó Ò Ȏ Ȍ Ô Ú Ù Ȗ Ȕ Û Ŕ R̀ Ȓ Ȑ R̂
ɨ ʉ ɯ ɪ ʏ ʊ ø ɘ ɵ ɤ ə ɚ ɛ œ ɜ ɝ ɞ ʌ ɔ æ ɐ ɶ ɑ ɒ ɑ̃ ɛ̃ œ̃ ɔ̃ ɸ β θ ð ʋ ɡ ʃ ʒ ɕ ʑ ʂ ʐ ç ʝ ɣ χ ħ ʕ ɲ ŋ ɴ ɹ ɻ ʀ ʁ ɬ ʎ ɰ ɥ t͡ʃ d͡ʒ t͡ɕ d͡ʑ p̪͡f t͡s d͡z ː ˈ ˌ ‿
„“ „” ’ »« ›‹ - – — … | ~ ∅ < > ← → [] {} 〈〉° § × = ≠

Would it in any way be possible to make a keyboard like this, which would, as you can see, implement not only Latin symbols but also Cyrillic, IPA, and various punctuation signs, all of which are necessary in linguistics?

Keyman Developer is an application for developing keyboards for individual languages, multiple languages, or lingusitic (special character) use.

Please see http://keyman.com/developer/ for more information. Note that Keyman Developer 9 beta, which can be freely downloaded and used, is fully functional.

(Keyman Developer 8 requires a license to use beyond the 30-day trial period, or to distribute keyboards developed using that version.)