KALIMAHS

Kalimahs are verses that are compiled for people to memorise and learn the fundamentals (usually, Tauhid) of Islam.  There are 6 of them:

1. Kalimah Thayyibah
2. Kalimah Syahaadah
3. Kalimah Tamjeed
4. Kalimah Tauheed
5. Kalimah Istighfar
6. Kalimah Rudd Kufr

Kalimah Thayyibah

لَآ اِلٰهَ اِلَّا اللّٰهُ مُحَمَّدٌ رَّسُوْلُ اللّٰ
"lā elaha ella Allahu, Muhammad ur-rasul Ullah"

There is none worthy of worship but Allah, Muhammad [peace be upon him] is the messenger of Allah.

Kalimah Syahaadah

اَشْهَدُ اَنْ لَّآ اِلٰهَ اِلَّا اللہُ وَحْدَهٗ لَا شَرِيْكَ لَهٗ وَ اَشْهَدُ اَنَّ مُحَمَّدً اعَبْدُهٗ وَرَسُوْلُهٗؕ
Ašh-hadu an-lā ilāha il-lal-lahu, wah-dahu, lā sha-reeka la-hu, wa ašh-hadu an-na Muḥammadan ʿabduhu wa rasūluhu

I bear witness that none is worthy of worship but Allah, the One alone, without partner, and I bear witness that Muhammad [peace be upon him] is His Messenger

Kalimah Tamjeed

سُبْحَان اللهِ وَ الْحَمْدُ لِلّهِ وَ لآ اِلهَ اِلّا اللّهُ وَ اللّهُ اَكْبَرُ وَلا حَوْلَ وَلاَ قُوَّة ِ الَّا بِاللّهِ الْعَلِىّ الْعَظِيْم
Subhāna-llāhi, wa-l-hamdu li-llāhi, wa lā ilāha illā-llāhu, wa-llāhu akbar. Wa lā hawla wa lā quwwata illā bi-llāhi-l-ʿaliyyi-l-ʿazīm

Glory be to Allah and Praise to Allah, and there is none worthy of worship but Allah, and Allah is the Greatest. And there is no might or power except with Allah, the Exalted, the Great One.

Kalimah Tauheed

لَآ اِلٰهَ اِلَّا اللهُ وَحْدَهٗ لَا شَرِيْكَ لَهٗ لَهُ الْمُلْكُ وَ لَهُ الْحَمْدُ يُحْىٖ وَ يُمِيْتُ وَ هُوَحَیٌّ لَّا يَمُوْتُ اَبَدًا اَبَدًاؕ ذُو الْجَلَالِ وَالْاِكْرَامِؕ بِيَدِهِ الْخَيْرُؕ وَهُوَ عَلٰى كُلِّ شیْ ٍٔ قَدِیْرٌؕ
la ilaha ill-allahu waḥdahu lā Sharīka lahu la-hul-mulku wa lahu'l-ḥamdu yuh-yi wa yumītu wa hu-wa ḥayyu-llā yamūtu abadan abada, zū-l-jalāli wa-l-ikrām, biyadihi-l-khayr, wa huwa ʿalā kulli shayʾin qadīr.

(There is) none worthy of worship except Allah. He is only One. (There are) no partners for Him. For Him is the Kingdom. And for Him is the Praise. He gives life and causes death. And He is Alive. He is Eternal. Possessor of Majesty and Reverence. In His hand is the good. And He is on everything powerful.

Kalimah Istighfar

اَسْتَغْفِرُ اللهَ رَبِّىْ مِنْ كُلِّ ذَنْۢبٍ اَذْنَبْتُهٗ عَمَدًا اَوْ خَطَا ًٔ سِرًّا اَوْ عَلَانِيَةً وَّاَتُوْبُ اِلَيْهِ مِنَ الذَّنْۢبِ الَّذِیْٓ اَعْلَمُ وَ مِنَ الذَّنْۢبِ الَّذِىْ لَآ اَعْلَمُ اِنَّكَ اَنْتَ عَلَّامُ الْغُيُوْبِ وَ سَتَّارُ الْعُيُوْبِ و َغَفَّارُ الذُّنُوْبِ وَ لَا حَوْلَ وَلَا قُوَّةَ اِلَّا بِاللهِ الْعَلِىِّ الْعَظِيْمِؕ
Astaġfiru-llāha rabbī min kulli ḏanbin aḏnabtuhu ʿamadan aw khaṭāʾan sirran aw ʿalāniyyatan wa atūbu ilayhi mina-ḏḏanbi-llaḏī aʿlamu wa mina-ḏḏanbi-llaḏī lā aʿlamu innaka anta ʿallāmu-l-ġuyūbi wa sattāru-l-ʿuyūbi wa ġaffāru-ḏḏunūbi wa lā ḥawla wa lā quwwata illā bi-llāhi-l-ʿaliyyi-l-ʿaẓīm.

"I seek forgiveness from Allah, my Lord, from every sin I committed knowingly or unknowingly, secretly or openly, and I turn towards Him from the sin that I know and from the sin that I do not know. Certainly You, You (are) the knower of the hidden things and the Concealer (of) the mistakes and the Forgiver (of) the sins. And (there is) no power and no strength except from Allah, the Most High, the Most Great".

Kalimah Rudd Kufr

اَللّٰهُمَّ اِنِّیْٓ اَعُوْذُ بِكَ مِنْ اَنْ اُشْرِكَ بِكَ شَيْئًا وَّاَنَآ اَعْلَمُ بِهٖ وَ اَسْتَغْفِرُكَ لِمَا لَآ اَعْلَمُ بِهٖ تُبْتُ عَنْهُ وَ تَبَرَّأْتُ مِنَ الْكُفْرِ وَ الشِّرْكِ وَ الْكِذْبِ وَ الْغِيْبَةِ وَ الْبِدْعَةِ وَ النَّمِيْمَةِ وَ الْفَوَاحِشِ وَ الْبُهْتَانِ وَ الْمَعَاصِىْ كُلِّهَا وَ اَسْلَمْتُ وَ اَقُوْلُ لَآ اِلٰهَ اِلَّا اللهُ مُحَمَّدٌ رَّسُوْلُ اللهِؕ
Allāhumma innī aʿūḏu bika min an ushrika bika shayʾaw-wwa-anā aʿlamu bihi wa-staġfiruka limā lā aʿlamu bihi tubtu ʿanhu wa tabarra'tu mina-l-kufri wa-šh-šhirki wa-l-kiḏhbi wa-l-ġībati wa-l-bidʿati wa-nnamīmati wa-l-fawāḥiši wa-l-buhtāni wa-l-maʿāṣī kullihā wa aslamtu wa aqūlu lā ilāha illā-llāhu Muḥammad ur-rasūl Ullāh.

" O Allah! I seek protection in You from that I should  join any partner with You and I have knowledge of it. I seek Your forgiveness from that which I do not know. I repent from it (ignorance) and I reject disbelief (kufr) and joining partners with You (shirk) and of falsehood and slandering (gheebat) and innovation in religion (bid'at) and tell-tales (nameemat) and bad, evil deeds (fawahish) and the blame and the disobedience, all of them. I submit to Your will and I believe and I declare: There is none worthy of worship except Allah and Muhammad( Peace Be Upon On Him) is His Messenger."

The above video is a nice demonstration of the recited Kalimahs.  There are some differences but these are just variations.  You'll realise that the bulk of the meaning are the same.

Recite the Kalimahs as often as you like.  Some have been made into beautiful rhythms.  These Kalimahs are beautiful as they are...