Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 775 369
2) Placement test : grammar for beginners (lucile83) 5 986 867
3) A/AN (webmaster) 5 362 033
4) Auxiliary BE (webmaster) 3 222 699
5) Present continuous (webmaster) 2 997 256
6) Present simple (webmaster) 2 908 177
7) Present simple (webmaster) 2 595 603
8) Present continuous (webmaster) 2 430 406
9) Adjectives (webmaster) 2 092 612
10) A/an (anonyme) 2 013 550
11) Present perfect simple (webmaster) 1 639 884
12) Preterite (webmaster) 1 623 089
13) Vocabulary - Placement test (bridg) 1 618 424
14) Preterite (webmaster) 1 444 474
15) Short placement test (webmaster) 1 442 780
16) To be (bridg) 1 405 225
17) What time is it? (webmaster) 1 348 249
18) Present perfect (webmaster) 1 343 385
19) The alphabet in English (webmaster) 1 320 152
20) Adjectives (lucile83) 1 214 991
21) What time is it? (webmaster) 1 206 533
22) Numbers (webmaster) 1 188 055
23) 'A' ou 'An' (anonyme) 1 174 144
24) Two presents: present continuous, present simple (webmaster) 1 148 187
25) To be (bridg) 1 144 747
26) Comparatives / Superlatives (webmaster) 1 100 800
27) Numbers (webmaster) 1 069 834
28) CAN / MUST (webmaster) 1 057 907
29) THE/ A / AN / nothing (webmaster) 1 032 055
30) Comparatives (webmaster) 1 006 557
31) Family life (bridg) 999 987
32) Numbers > 100 (webmaster) 985 865
33) Future (going to/will/present continuous) (anonyme) 962 389
34) Plural (webmaster) 955 069
35) Superlatives (webmaster) 874 327
36) Adjectives (anonyme) 874 099
37) Simple present (bridg) 853 059
38) Spelled words N°1 (bridg) 849 506
39) Placement test beginners: Check your spelling (lucile83) 829 752
40) Introducing oneself (webmaster) 826 761
41) Adverbs of frequency (lucile83) 816 117
42) Family (bridg) 784 066
43) General test-End of high school / Beginning of university (webmaster) 782 169
44) Present simple (lucile83) 778 881
45) Frequency adverbs (webmaster) 777 251
46) Present BE + Ving (bridg) 764 268
47) Genitive (webmaster) 723 056
48) Family tree (anonyme) 718 901
49) Passive form (lucile83) 717 082
50) Preterite: simple or continuous? (webmaster) 715 647
51) Placement test (beginners) (lili73) 700 340
52) Past simple or present perfect (lucile83) 692 512
53) Future (webmaster) 675 466
54) 2 Preterites (webmaster) 661 155
55) Present perfect simple (bridg) 658 943
56) Preterite (webmaster) 619 400
57) List of 200 irregular verbs and audio (bridg) 615 393
58) Modals (webmaster) 612 310
59) Spelled words N°2 (bridg) 608 695
60) Height (webmaster) 606 000
61) Modals (webmaster) 604 153
62) Articles a / an / the (lucile83) 596 738
63) Plural forms (bridg) 576 830
64) Nationalities (webmaster) 573 820
65) Past continuous / Past simple (anonyme) 564 417
66) Irregular plurals (bridg) 553 061
67) Two presents: simple and continuous (webmaster) 549 100
68) Preterite (bridg) 548 366
69) Superlatives (frapedur) 536 575
70) Vocabulary: greeting people (here4u) 536 435
71) Give your opinion (bridg) 531 462
72) Adverbs of Frequency (bridg) 516 568
73) Present simple or continuous (lucile83) 509 371
74) Present perfect / preterite ? (anonyme) 507 691
75) Possessive case (anonyme) 480 175
76) Countries & nationalities (bridg) 472 928
77) 'The' or nothing? (webmaster) 470 913
78) Introducing oneself (easy) (webmaster) 470 420
79) Past tenses (bridg) 470 137
80) Passive voice (webmaster) 462 230
81) Present Simple vs. Past Simple (anonyme) 455 738
82) Questions : how to ask them (lucile83) 447 801
83) General Test II / End of high school / Beginning of universi (webmaster) 445 806
84) IN, ON, AT or TO? (webmaster) 444 560
85) Relative pronouns (webmaster) 443 715
86) Comparative of superiority (lucile83) 437 441
87) How to pronounce the final -ED? (past simple) (webmaster) 436 647
88) Relative clauses (webmaster) 422 872
89) Sounds: [h] (webmaster) 419 243
90) Comparative (anonyme) 412 692
91) A/an/Ø (bridg) 398 147
92) Future simple (lucile83) 395 608
93) Past simple (anonyme) 395 076
94) This / That / These / Those (webmaster) 392 200
95) Conditional (webmaster) 391 194
96) Passive voice (anonyme) 389 908
97) Comparing (webmaster) 387 740
98) Can / could/ may/ might (woodyrun) 378 967
99) Present perfect or past tense (anonyme) 376 443
100) Much, many, little and few (felin) 371 854
101) Personal pronouns (anonyme) 371 168
102) Preterite continuous (BE + -ING) (webmaster) 368 241
103) Some, any, no, enough, too/too much/too many (webmaster) 367 863
104) Genitive case (bridg) 367 469
105) Confusing words - Placement test (bridg) 364 398
106) Irregular verbs (webmaster) 363 123
107) Numbers from 1 to 10 (lucile83) 361 250
108) Past perfect simple, past perfect continuous (anonyme) 360 695
109) Present continuous or present simple (webmaster) 359 322
110) Present perfect or preterite? (anonyme) 355 891
111) Simple Past : regular verbs (anonyme) 352 178
112) Comparative Adjectives (bridg) 351 926
113) Who, Whom, Which, or Whose? (anonyme) 348 361
114) Past simple (video) (lucile83) 347 659
115) Past simple or past continuous (lucile83) 340 960
116) While / When (anonyme) 337 819
117) What time is it? (webmaster) 337 431
118) Modals (tinou) 336 240
119) Modal: may/might (lucile83) 333 903
120) Cardinal and ordinal numbers (anonyme) 328 448
121) The superlative (anonyme) 324 057
122) Possessive adjectives and pronouns (woodyrun) 323 811
123) How to talk about the weather (lili73) 320 851
124) Since and for (lucile83) 318 264
125) Flags (webmaster) 317 264
126) Irregular verbs (bridg) 315 626
127) Prepositions - in, on, at (anonyme) 313 895
128) Pronouns (woodyrun) 312 766
129) Tenses (anonyme) 311 447
130) Placement test 3 (webmaster) 310 174
131) Order of adjectives (webmaster) 306 313
132) Could/Couldn't (laure95) 305 594
133) Comparative (anonyme) 304 117
134) Adjectives and prepositions (lucile83) 303 874
135) Agreement Tags (webmaster) 303 793
136) Asking questions (webmaster) 302 847
137) Present perfect OR simple past? (bridg) 298 092
138) Questions in the past tense (lucile83) 297 145
139) Superlative Adjectives (bridg) 295 461
140) Uncountable nouns (webmaster) 295 303
141) Object pronouns (bridg) 294 254
142) Placement test 1 (lucile83) 292 452
143) Present simple (lucile83) 290 496
144) Passive form (anonyme) 289 509
145) Prefer/rather (bridg) 289 019
146) Can/Must/Should (laure95) 288 642
147) Must or Have to? (woodyrun) 286 734
148) Past perfect (lili73) 286 721
149) The/an/nothing (bridg) 284 861
150) To be (anonyme) 283 290
151) Vocabulary: asking and answering (here4u) 280 421
152) Can and can't (laure95) 280 071
153) Modal verbs (bridg) 277 058
154) Some / Any / no... (bridg) 270 084
155) Days of the week (bridg) 269 024
156) So / neither (anonyme) 264 192
157) Past simple (video) (lucile83) 263 464
158) Used to (bridg) 260 205
159) Should / must (anonyme) 259 157
160) Past tense (anonyme) 259 056
161) Present continuous (chnawa) 258 926
162) Vocabulary: on the phone (here4u) 258 698
163) Find out a quantity (webmaster) 258 425
164) Superlative + and adjective (lucile83) 256 910
165) Articles : a / an / the / Ø (anonyme) 255 701
166) Comparative and superlative (anonyme) 254 303
167) Numbers 1/100 (anonyme) 253 293
168) Modal can (video) (lucile83) 252 661
169) Relatives pronouns (who, which, that...) (anonyme) 247 796
170) Comparatives (anonyme) 245 792
171) Vocabulary: at the restaurant (here4u) 245 631
172) A few, a little, few, little (anonyme) 244 888
173) Would rather / would prefer to (anonyme) 244 088
174) Present continuous and the Going to form (anonyme) 242 298
175) Have something done (anonyme) 239 620
176) Should/ have to/ must (anonyme) 239 514
177) The past (webmaster) 237 691
178) Future continuous and future perfect. (felin) 237 388
179) Used to/would (woodyrun) 237 137
180) How to ask a question in English (bridg) 234 979
181) I wish, if only (felin) 233 909
182) Pluperfect (webmaster) 233 659
183) Countable or Uncountable? (webmaster) 232 891
184) Some / any (younes91) 231 980
185) Should / shouldn't (anonyme) 231 108
186) Present simple or continuous (bridg) 230 765
187) Adjectives - ing and ed (felin) 228 631
188) Hypothesis (webmaster) 227 847
189) Auxiliary BE (lucile83) 226 223
190) Articles a/an/the/0 (bridg) 226 058
191) Article The or nothing (anonyme) 225 739
192) Present perfect with Ever - never - (anonyme) 225 334
193) Present continuous OR Present simple? (bridg) 225 193
194) Must or mustn't (laure95) 224 708
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 641
196) To / in order to / so as to / so that (irish21) 219 606
197) Present perfect (bridg) 219 308
198) What time is it ? (anonyme) 217 447
199) Comparison (komiks) 217 227
200) Indirect speech (bridg) 215 977
